[Buffalo] , New York, on Saturday and massacred 13 people, almost all blacks. [Payton] Gendron, 18, surrendered after the carnage, which he lived-streamed on a social media platform, and was charged with first-degree murder in what law enforcement officials described as a racially motivated hate crime. He pleaded not guilty and was remanded without bail. There appeared to have been plenty of red flags about Payton’s extremist views and his intent to conduct mass shooting. Aside from the racist opinion he expressed in the manifesto, authorities in the school where he studied told the local media in Buffalo that he...