Peppered among these incidents is a phenomenon distinct from the routine racism so familiar in this country: the provocative use of “Trump,” after the man whose comments about Mexicans, Muslims and undocumented immigrants — coupled with his muted responses to white nationalist activity — have proved so inflammatory. His words have also become an accelerant on the playing field of sports, in his public criticism of black athletes he deems to be unpatriotic or ungrateful.

Officials at Salem State University in Massachusetts discovered hateful graffiti spray-painted on benches and a fence surrounding the baseball field, including “Trump #1 Whites Only USA.” An undocumented immigrant in Michigan reported to the police that two assailants had stapled a note bearing a slur to his stomach after telling him, “Trump doesn’t like you.” A white Massachusetts businessman at Kennedy International Airport in New York was charged with assaulting and menacing an airline worker in a hijab, saying, among other threats: “Trump is here now. He will get rid of all of you.”