Cruz, Walker, Kirk and—especially—Bolton are furious at the world. Their solution: Declare war on it. At the end of a week when many paused to reflect during Passover and Easter ceremonies, a question with no real answer seemed to crash into our culture with all the subtlety of a marching band in a funeral parlor: Why do so many Republicans seem so angry all the time at so much around us? The fury of some like Ted Cruz is understandable. It’s fueled by his massive ego and outsized ambition along with his personal belief that he is so smart and...