After Donald Trump’s travel ban went into effect, Justin Trudeau addressed refugees on Twitter: ‘Canadians will welcome you, regardless of your faith. Diversity is our strength.’ The next day a man opened fire in a mosque in Quebec City, murdering six people and injuring 19 just after the evening prayer. According to initial media reports, which later proved mistaken, there were two shooters, one of them Muslim, who allegedly entered the mosque shouting ‘Allahu akbar’ – as if only Muslims could commit this sort of crime. That's presumably why the White House press secretary, Sean Spicer, mystifyingly claimed that the Quebec attack justified Trump’s anti-Muslim policies. The Muslim ‘suspect’, it later turned out, was trying to help the victims. The man charged with the crime, Alexandre Bissonnette, a 27-year-old French-Canadian, is a fan of Donald Trump and Marine le Pen. He apparently wanted to signal that, despite Trudeau’s messages, Muslims are as unwelcome in Canada as in the US.