Donald Trump may have just gotten himself banned from entering the United Kingdom under the country's strict anti-extremism policies.

Trump today retweeted a series of hateful anti-Muslim videos -- at least one of which is a known fake, according to the Dutch government -- from a notorious British hate group, "Britain First." The videos purport to show British Muslims smashing icons of the Virgin Mary, beating up disabled kids, and throwing people from roofs.

Under UK anti-extremism guidelines, the government is supposed to exclude non-UK nationals, like Trump, from entering the country if they use their position of power to disseminate hate. That is in fact what Trump just did (though it's hardly his first time).

The UK guidelines specifically prohibit extremists "using a position of responsibility" and "express[ing] views which.... foster hatred which might lead to inter-community violence in the UK."

British Prime Minister Theresa May's own statement today about Trump's actions, noting that Britain First disseminates "hateful narratives which peddle lies and stoke tensions," are prima facie proof that Trump violated UK anti-extremist policies.

Whether he's embracing neo-Nazis, endorsing accused pedophiles, or fomenting anti-Muslim hate speech, Donald Trump thinks he can spread hate and extremism without consequence. In the interest of us all, the British government must enforce its own anti-extremism guidelines and ban Donald Trump from entering the UK until, as the guidelines require, he repudiates his extremist views.

Please sign the petition to Prime Minister May, and urge her to do the right thing.