Following the killing of right-wing influencer Charlie Kirk, confusion has mounted about the motives of the alleged shooter, 22-year-old Utah resident Tyler Robinson. Despite uncorroborated claims by Utah Gov. Spencer Cox that Robinson was steeped in “leftist ideology,” Robinson’s personal politics aren’t yet clear and may never be. Pundits and other commentators have struggled to fit him into the familiar mold of a politically motivated killer. Part of the confusion is the memes. According to a police affidavit, the shooter inscribed bullet casings with references to furry and gaming memes as well as phrases such as “hey fascist! CATCH!” Based...