LONDON — Now we know what globalizing the intifada looks like. In Manchester last week, a rabbi addressed his congregation in a robe stained with blood. Hours earlier, on Yom Kippur, Judaism’s holiest day, a jihadi terrorist rammed a car into worshippers at the gates of a synagogue before going on a stabbing spree. By the time officers shot the attacker, two were dead and four more injured, some from accidental police fire.