London —
When some 150,000 people descended on London in September for a rally organized by Tommy Robinson – an agitator who spreads anti-Muslim bigotry and has several criminal convictions – it felt like a watershed moment in British politics.
“Something in our country changed,” Sadiq Khan, the mayor of London, said at the time. “This felt different.”
And so when at least tens of thousands gathered again in the British capital on Saturday for the latest “Unite the Kingdom” march, it felt less out of the ordinary. Views that would once not have been expressed in public are becoming commonplace. Marches organized by Robinson, whose real…