The key words “Appears to be.” A more careful reading of the shooter’s rantings show he is most likely not “right wing”. He labels himself an “enviro-facists” yet that is ignored. As is his admiration for China’s government.
He is a person who wants the world to burn; kind of like The Joker. He clearly indicated he wanted to stir up trouble, and he wrote plenty of completely stupid, obviously false things that would stir people up.