At the end of last year, the British far-right group Patriotic Alternative (PA) was allowed back on Twitter after a ban of nearly two years for an unknown transgression. Far-right groups immediately urged Elon Musk to “be a hero” and also reinstate the account of the group’s leader, Mark Collett. Three weeks later, they rejoiced as Collett’s account was returned. The reinstatements appear to be part of Musk’s commitment to free speech. But if he knew anything at all about PA, he would realise that he has placed a target on the back of every disenfranchised and politically lost young...