When Donald Trump appeared on the political scene he seemed a joke, but now the joke is on us. He’s a wall builder and a hatemonger in a world that desperately needs to tear down walls and end hatred for our very survival. How did this happen? What do we do? Is evil taking over? Is love dead?Paul Sutherland: If Donald Trump has done one great thing, he has put these big questions front and center—and made us as Americans look at ourselves. Trump is playing to our fears, exciting our greed, and selling us a scheme that we can be rich like him. Just vote for his prosperity gospel of deal making, isolation, exploitation, shouting down the opposition, and shunning those who are ignorant, trusting, or different. And he is doing it in a way that is entertaining. I read a claim that those who love Trump listen to him for one hour a day, while those who loathe him listen for two hours because he is so outrageous.So Mr. Trump is getting attention, and in a world in which there is no bad press, no bad publicity, and anything that gets your name in the limelight is (politically) positive, he has done this well. So …