In the wake of yesterday’s terror attacks, including the one in Berlin in which 12 people were killed and many more injured, Donald Trump tweeted that the civilized world must “change thinking.” A disdainful Joe Scarborough reacted on today’s Morning Joe: “I don’t know exactly what the civilized world is going to do about trucks, unless we’re going to ban trucks. But again, some of the deadliest attacks have been with vehicles.” But the driver of the truck in Berlin yesterday was reportedly a Pakistani “refugee.” And the truck in the Nice attack that killed 86 people was driven by...