The stoic determination and decency of the British people and their leaders was on full display in the hours after the latest horrific terrorist rampage. The Brits fought back, launching drinking glasses and chairs at the savages who attacked them. The police acted with lightning-fast precision, killing the three assailants within eight minutes of the emergency call. And, God bless him, a man returned to the bar where he experienced Saturday's horror — to pay his bill and tip. Civilisation is not going to be driven out of Britain by three, or three hundred, killers.

Meanwhile, and it pains me to write this, our President acted like a clod, a heartless and dull-witted thug in sending out a series of tweets. He — commander in chief and leader of the free world — first retweeted an unverified, unofficial Drudge headline about the unfolding terrorist attack. Then he aimed to bolster his Muslim travel ban (which is not supposed to be a Muslim travel ban).

“We need to be smart, vigilant and tough,” he tweeted. “We need the courts to give us back our rights. We need the Travel Ban as an extra level of safety!” (Aside from the inappropriateness of President Donald Trump's tweet, he fails to grasp that the courts in these cases are reaffirming our rights against an overreaching, discriminatory edict.)

After receiving blowback for that obnoxious missive, he tweeted out, “Whatever the United States can do to help out in London and the UK, we will be there - WE ARE WITH YOU. GOD BLESS!” But then he decided to slam the mayor of the city attacked, who had calmly warned his fellow Londoners: “Londoners will see an increased police presence today and over the course of the next few days. There's no reason to be alarmed.”

Trump took the second part out of context and responded viciously, “At least 7 dead and 48 wounded in terror attack and Mayor of London says there is 'no reason to be alarmed!'” (The mayor, of course, was telling them not to be alarmed by the heightened police presence.) Trump was not done, however, inanely tweeting, “Do you notice we are not having a gun debate right now? That's because they used knives and a truck!”

One is prompted to ask if he is off his rocker. But this is vintage Trump — impulsive and cruel, without an ounce of class or human decency. His behaviour no longer surprises us, but it should offend and disturb us, first, that he remains the face and voice of America in the world and, second, that his fans hoot and holler, seeing this as inconsequential or acceptable conduct. We wound up with this president because millions of Republicans could not prioritise character, decency and overall fitness to serve over their mundane and frankly petty partisan wish list (28 percent top marginal tax rate!). Self-appointed religious leaders fail to see that this soullessness — not the dreaded liberal elite who insist on saying “Happy Holidays” or refuse to countenance discrimination against gay customers — is a threat to the moral fibre of a democracy that requires a modicum of common sense and human decency to function.

Sure, Trump's policies and rhetoric are incoherent and based on a tower of lies. Far worse, however, is his appalling character, which accelerates the erosion of democratic norms and social cohesion a diverse democracy requires. In instances like this, those who would lecture us on President Barack Obama's under-appreciation of America's unique place in human history or proclaim that they simply had to vote for Trump because Hillary Clinton was some sort of monster are exposed as fools or hypocrites or both.

London Bridge Terror Attack Show all 16 1 /16 London Bridge Terror Attack London Bridge Terror Attack Armed police on Borough High Street as police are dealing with a "major incident" at London Bridge PA London Bridge Terror Attack Armed Police talk to members of the public outside London Bridge Hospital as police are dealing with a "major incident" at London Bridge PA London Bridge Terror Attack Police Officers outside the Barrowboy and Banker Public House on Borough High Street as police are dealing with a "major incident" at London Bridge PA London Bridge Terror Attack Armed Police talk to members of the public outside London Bridge Hospital as police are dealing with a "major incident" at London Bridge PA London Bridge Terror Attack Armed police on Borough High Street as police deal with a 'major incident' at London Bridge PA London Bridge Terror Attack Emergency services near the scene of the incident Screengrab London Bridge Terror Attack People run down Borough High Street as police are dealing with a "major incident" at London Bridge Reuters London Bridge Terror Attack Emergency services arrive at the scene near Borough market at London Bridge Carl Court/Getty Images London Bridge Terror Attack Emergency personnel on London Bridge as police are dealing with a "major incident" at London Bridge PA London Bridge Terror Attack Police sniffer dogs on London Bridge as police are dealing with a "major incident" at London Bridge PA London Bridge Terror Attack A second helicopter lands on London Bridge as police are responding to three incidents in the capital, amid reports that a vehicle collided with pedestrians on London Bridge, Scotland Yard said. Officers are dealing with reports of stabbings in Borough Market, where armed officers attended and shots were fired. They are also at an incident in the Vauxhall area PA London Bridge Terror Attack Police attend to an incident on London Bridge in London REUTERS London Bridge Terror Attack Police attend to an incident on London Bridge in London, Britain Reuters London Bridge Terror Attack A police officer escorts members of the public to safety at London Bridge Getty Images London Bridge Terror Attack Police attend to an incident on London Bridge in London, Britain Reuters London Bridge Terror Attack Police attend to an incident near London Bridge in London, Britain Reuters

The London attacks bring out the best in Britain and in Western leaders on the European continent; it brings out the worst in Trump and his followers. The former protect the soul of Western civilisation; the latter drive a stake through the animating ideas that make America special.