Nigerian preacher Oluwole Ilesanmi was arrested in February in front of a subway station after a passer-by called called police, accusing him of “Islamophobic” remarks. A police officer snatched the preacher’s Bible and said: “No one wants to hear that. They want you to go away.” Officers then drove him several miles away and let him out of the car.

The arrest prompted a petition campaign in March urging the British home secretary to protect street preachers. ...