Even before Donald Trump Jr. appeared on The View yesterday, liberal celebrities were howling their fury.

Will and Grace actress Debra Messing, who hasn't stopped hysterically raging about all things Trump for the past four years, was incensed the President's son was even allowed to go on at all.

'Why would you bring him on?' she tweeted the ABC show's Twitter account. 'You trying to be 'balanced'?'

You could almost feel the bile laced all over her lips as she spat out the dreaded b-word.

Nobody's allowed to be 'balanced' about President Trump any more.

For vehement anti-Trumpers like Ms Messing only extremely UN-balanced hyper-partisan hatred and revulsion is acceptable.

'He and his family have assaulted our country,' Messing continued, 'our democracy, our environment, our national security, moral compass. Very very disappointing and irresponsible decision.'

Even before Donald Trump Jr. appeared on The View yesterday, liberal celebrities were howling their fury - and as the showdown went on, things turned fascinatingly ugly

Messing is an expert in disappointing and irresponsible decisions.

A few weeks ago, she demanded the Hollywood Reporter publish the names of everyone attending a Trump fundraiser in Beverly Hills. Her Will and Grace co-star Eric McCormack revealed the sinister motive behind this demand: 'Kindly report on everyone attending this event, so the rest of us can be clear about who we don't wanna work with. Thx.'

Ironically, it was View co-host Whoopi Goldberg who reminded Messing and McCormack of the last time the Hollywood Reporter ran a 'blacklist' 70 years ago, when it named people in the industry who were suspected of being Communists or sympathizers.

It led to people – including actors, producers, directors and set designers - being shamed, fired, shunned, and in some cases, killing themselves.

But Messing and McCormack didn't care about such trifling historical horror – they just wanted pro-Trumpers similarly named, shamed, vilified and ostracized.

Will and Grace actress Debra Messing was incensed the President's son was even allowed to go on at all

Trump Jr., who appeared alongside girlfriend Kimberly Guilfoyle, turned the tables on some of his family's most savage critics, and exposed their searing hypocrisy

There is, of course, no legitimate reason why Donald Trump Jr. should not be a guest on ABC's excellent and top-rated flagship daytime panel show.

He's not just the son of the President, he was also a famous name long before the White House beckoned for his family, thanks to his many years as a boardroom adviser to his father on The Apprentice, which is where I first met him 12 years ago.

I've found him since to be a smart, amusing and combative character very much in the mold of his dad to whom he is ferociously loyal. And he's a very good media performer.

So I was fascinated to see how he would get on when he appeared on a show whose stars, especially Joy Behar, Whoopi Goldberg and Meghan McCain, have made no secret of their disdain for the President. (So much so that Goldberg wouldn't even mention Donald Trump Sr.'s name at the start of the show.)

The answer was… spectacularly.

When he came under intense fire for his father's inappropriate behavior, Trump Jr. retorted by saying 'we've all done things we regret' and then accused shocked Behar of once wearing blackface. In 2016, she shared this image of herself dressed as 'a beautiful African woman' at a costume party

In fact, it was one of the wildest daytime talk show interviews I can ever remember watching, accompanied by constant raucous boos and cheers from the audience.

It was also one of the most revealing.

For Trump Jr. turned the tables on some of his family's most savage critics, and exposed their searing hypocrisy.

When he was grilled about his decision to tweet out an article naming the alleged whistle-blower in the Ukraine scandal, Trump Jr. pointed out that not only had the name already appeared on numerous media websites like the Drudge Report, but ABC had literally just fried an ex-employee 'whistle-blower' for leaking damaging information about the network's alleged cover-up over the Jeffrey Epstein scandal – getting the person fired by their new bosses at CBS.

And when Sunny Hostin said Trump Jr. had broken the law by 'outing the whistle-blower', he responded that it wasn't a crime for private citizens.

He was right.

A few weeks ago, Messing and her Will and Grace co-star Eric McCormack demanded the Hollywood Reporter publish the names of everyone attending a Trump fundraiser in Beverly Hills, revealing the sinister motive behind this demand: 'Kindly report on everyone attending this event, so the rest of us can be clear about who we don't wanna work with. Thx.'

As DailyMail.com US Political Editor David Martosko reported, it's not a felony for private citizens to out whistle-blowers.

As the showdown went on, things turned fascinatingly ugly.

When he came under intense fire for his father's inappropriate behavior, Trump Jr. retorted by saying 'we've all done things we regret' and then accused shocked Behar of once wearing blackface.

'I did not go in blackface!' she exclaimed indignantly.

This was a barefaced lie. She did.

'No, she was not in blackface!' insisted Goldberg. 'Being black, I recognize blackface. I know it when I see it.'

Hmmm. Clearly not.

On a previous episode of The View in 2016, Behar admitted deliberately darkening her skin color to attend a party as a 'beautiful African woman'. A photo of her wearing her blackface even appeared on screen.

Trump Jr. then turned to Goldberg and accused HER of downplaying fugitive child rapist Roman Polanski's criminal conduct.

'Whoopi, you've said Roman Polanski.. it wasn't 'rape-rape' when he raped a child.'

Goldberg looked aghast at being confronted about her own words back in 2009, when she was heavily criticized for defending Polanski who drugged, raped and sodomized a 13-year-old girl, then fled America to escape justice.

'I know it wasn't rape-rape,' she said then. 'It was something else.'

By reminding Goldberg of her shocking statement, Trump Jr. also reminded us all of Hollywood's outrageous on-going support for Polanski, which is staggeringly hypocritical in this #MeToo era where liberals bay for blood at the slightest suggestion of sexual bad behavior.

There were moments when Trump Jr. was rightly held to account for his father's actions, not least his appalling attacks on Gold Star families like the parents of slain Muslim US soldier Humayan Khan.

Meghan McCain, who has herself had to endure horrible and completely unacceptable abuse from President Trump about her father, the late great Senator John McCain, spoke in a calm and dignified way when she said: 'You and your family have hurt a lot of people and put a lot of people through a lot of pain, including the Gold Star Khan family,' she said. 'Does all of this make you feel good?'

'I don't think any of that makes me feel good,' he replied, in a commendable moment of honesty.

He defended is father by lauding his undeniable economic achievements, saying: 'He's brought jobs back, he's created unprecedented levels of unemployment numbers for African-Americans.'

At this point, Goldberg recoiled in mock horror and sighed audible disbelief.

'You can't argue with it because it's a fact,' said Trump Jr.

'It's not a fact,' said Goldberg.

But it IS a fact. Unemployment numbers for African-Americans are at a record low.

It's just not a fact any liberal celebrities want to give President Trump any credit for, because they don't want to give him credit for anything.

Just as they don't want to give any attention to the increasingly suspicious-looking activities of Hunter Biden in the Ukraine, who, as Trump Jr pointed out, was 'getting boards of companies and languages he can't speak, in companies he knows nothing about.'

President Trump has big questions to answer about his behavior with the Ukraine, but so does Joe Biden over his son's conduct out there while he was Vice-President.

The fact liberal celebrities don't care about the Biden side of this scandal comes back to Debra Messing's fury at the b-word: balance. Or lack of it.

Donald Trump Jr. was booked on The View to promote his new book 'Triggered: How the Left Thrives on Hate and Wants to Silence Us.'

Yet he wasn't asked a single question about the book, an extraordinary discourtesy that The View hosts would never have applied to any other author.

But then, as he said, there's one rule for the Trumps, and another for everyone else.

It took guts for Trump Jr. to go into the lionesses' den yesterday and he got the savaging he expected.

But he gave as good as he got, and in doing so, he also exposed much of the shameless hypocrisy and selective outrage that pervades the liberal celebrity anti-Trump mindset.

Joy Behar and Whoopi Goldberg love to regularly rant about President Trump being a lying racist p***y-grabber.

Yet yesterday, Behar brazenly lied to her audience about blacking up, and Goldberg was confronted with her own shameful defense of a child rapist.

The high moral ground is a very precarious place.

And as I keep warning, the higher hypocritical liberal celebrities try to mount it, the easier they make it for President Trump to get re-elected.