You can’t meet terrifying politics except with politics of your own. “Violence and extreme violence are part of our politics in a way that’s only going to get worse.” It’s hard, if you were frightened in London on Saturday – whether because you were part of the 5,000-strong counterprotest, or because you were not white – to see how you sit that out. “People are really demoralised. People feel life is tough. In the migration sector, in the refugee sector, in the climate sector,...