Joe Biden doesn’t sound very moderate when he says there is “no room for compromise” on “transgender equality.”

It is the “civil rights issue of our time,” he tweeted last week, elevating it above women’s equality, racial equality, and even climate “justice,” an issue he once told us was an “existential threat.”

The tweet was rather baffling, other than as an exercise in identity pandering.

Maybe Biden thought he could win over a segment of the 0.3 percent transgender voters who are irate that Bernie Sanders accepted an endorsement from libertarian podcaster and pronoun purist Joe Rogan.

But, by trying to outwoke Sanders on gender fluidity, Biden is empowering a tyrannical micro-minority determined to overturn biological reality and crush dissent.

Exhibit A is Denver Post columnist Jon Caldara, fired for writing that there are “only two sexes, identified by an XX or XY chromosome.”

“ ‘They’ is singular and up is down,” wrote Caldara in a Jan. 7 column criticizing The Associated Press Stylebook, the language-usage bible for reporters, which has decreed that gender is no longer binary and that “they” can be used as a singular pronoun.

Two weeks later, he slammed a Colorado law which requires controversial sex-education content in schools.

Democrats “don’t want education transparency when it comes to their mandate to convince your kid that there are more than two sexes, even if it’s against your wishes,” he wrote.

This was the last straw for his editors. After writing a weekly column for four years, he was shown the door.

Caldara is no social conservative. He supports-same sex marriage and doesn’t like Donald Trump. But, like Rogan, he is a libertarian who objects to compelled speech and “inaccurate pronouns.”

So, it doesn’t matter how the Denver Post tries to spin it, his firing is an attack on free speech by the very institution entrusted to defend it.

The paper has been opaque about its reasons, alluding only to “disrespectful language” in an editor’s note last week. But any fair reader of the statements of biological reality which Caldara reposted on social media would be hard pressed to find disrespect. Clearly, his editors thought his words were fine when they published them.

But the Denver Post is a shadow of its former self. Under the oppressive ownership of a hedge fund, it lacks the institutional courage required to stand against the transgender bullying which attacks any expression deviating from gender fluid orthodoxy.

The paper’s disintegrating backbone follows the decline of a free press all over the country, as Google and Facebook siphon away news revenue, and fake news muscles in.

Alden Global Capital took control of the Denver Post in 2010 and runs it through its subsidiary, Digital First Media, which has bought up some of the biggest newspaper chains in the country, including the McClatchy and Gannett organizations. It controls dozens of newspapers, from California to Massachusetts, and has stripped them to the bone.

It’s no scoop to understand that hedge funds with an appetite for extracting remnant value from failing newspapers have no interest in freedom of speech or the constitutional value of the Fourth Estate, let alone the importance of objective truth.

And the last thing woke capital wants is to be targeted by transgender activists. No special interest group is more relentless in crushing dissent around the world, using character assassination as a weapon.

When you have no commitment to free speech, surrender to bullies is the logical path of least resistance.

This may also explain Joe Biden’s trans-virtue signaling last week, to counter suspicions about his Catholic background and past cordiality toward Mike Pence.

But, if the leading moderate of the Democratic presidential field is promising to make transgender ideology his human-rights priority, we should understand what that means, for women’s sports, for schools, for prisons, for the military, for language.

If there is to be no compromise on transgender rights, then the rights of women and girls will have to be sacrificed.

Does Biden not care, for instance, about the right of biological females to compete in team sports on a level playing field, rather than against transgender athletes with all the natural physiological advantages that come from being born male?

How about the right of girls to preserve their modesty in single-sex locker rooms? Or the right of students not to be confused in sex-ed classes by radical gender theory which disputes the biological reality of two sexes.

Like every other minority, transgender people should be protected from discrimination, as our laws demand. But if you take him at his word, what Biden is advocating is the forceful restructuring of society according to the irrational demands of a subsection of a tiny minority. It’s no way to win an election.

Boy’s death avoidable

The twitter feed of Thomas Valva’s mother makes for sinister reading now that we know her accusations of abuse ended with the 8-year-old’s death allegedly at the hands of his cop father.

New York City police Officer Michael Valva and his fiancée, Angela Pollina, have been charged with second-degree murder over the autistic boy’s death, after he was forced to sleep outside in in a freezing garage.

But if anyone had listened to the boy’s Polish-born mother, he might still be alive.

For two years, Justyna Zubko-Valva has been posting heartrending videos and credible evidence of harm to her three sons on twitter.

She even posted letters from teachers saying the boys were starving and filthy.

Why were her complaints to authorities unanswered? Something is very wrong with a child-welfare system which ignores a mother’s fears.

Your excuses don’t fool anyone, Eric

Brooklyn Borough President Eric Adams doesn’t fool anyone when he says his Martin Luther King Day rant about gentrification wasn’t a racial slur against white people.

The crowd only started cheering when he said: “Go back to Iowa! You go back to Ohio! New York City belongs to the people that was here and made New York City what it is.”

It was a dog whistle about majority white states, and he disgraced his office when he chose to stoke division rather than promote healing at a time when New York is suffering from a plague of anti-Semitic attacks. Some perpetrators have tried to justify their hate crimes using the same excuse, that they are being alienated from old neighborhoods.

I tried to give Adams a chance last week to explain, but he dodged requests for an interview.

“I never once mentioned race,” he finally said in an e-mail through a spokesman yesterday.

“Cleveland, Ohio, for example, is majority-black. I have always felt gentrification is not about race, but attitude.”

Unconvincing from a wannabe mayor of this melting pot.