As the joint American-Israeli military campaign in Iran continues, President Trump’s coalition is starting to exhibit some cracks. The war in Iran has emerged as a proxy battle over a broader, long-simmering conflict within the right about Israel. And the fight over Israel is, in some important ways, a proxy battle about Jews in general. Big picture, what we’re seeing now is that the traditional divisions on the right between paleoconservatives and neoconservatives, between hawks and doves, are being reshaped into a battle over Israel specifically. It’s a very difficult subject; this issue has become highly emotional and personal for...