Nothing brings out the worst in human nature quite like a Donald Trump in front of a crowd of true-believers, but even by those miserable standards, Wednesday’s hate-fest in Greenville, N.C., was only the contents of a few linen closets and the presence a burning cross away from a Ku Klux Klan rally. If somebody has to explain to you why the chant of “send her back” directed at a Rep. Ilhan Omar, a naturalized American born in Somalia, is prime KKK material, there’s something seriously missing (complex organ, grayish-white, trillions of synapses, ring a bell?) from your cranium. Goading fellow Americans to be their best bigots isn’t something most of us regard as acceptable by any citizen of the U.S., let alone its elected leader. And good luck to the Trump apologists like Maryland Rep. Andy Harris still searching for an adequate rationalization. Even President Trump eventually expressed some regret over the incident, telling reporters on Thursday he “felt a little bit badly” about the chant.