Deranged trans gunman Jesse Van Rootselaar’s alarming social media footprint paints a portrait of a deeply disturbed young man with a fixation on hallucinogenic drugs and guns — dating back years before he murdered eight people in one of the worst massacres in Canadian history. He was a regular contributor on Reddit, and many of his archived posts viewed by The Post, and first confirmed by the Telegraph, include questions — and disturbing revelations — about his extensive drug use. “Yo what’s the danger in using 5-MeO-DMT alone?” he asked in a November 2023 thread, referring to a potent hallucinogen...