The only people who Donald Trump drives crazier than his enemies are his friends. We like Trump. We appreciate Trump’s largely remarkable record of achievements – remember how your 401k used to go up instead of plummeting into the earth? We even enjoy his mean tweets. But then he does something that is so obviously self-destructive and, moreover, something that has burned him before, and we want to rip our hair out and shriek like that tubby mutant in the raincoat who got on her knees as Trump’s inauguration was announced and howled “NOOOOOOOOO!” Okay, why the hell does he...