From his manifesto:
It would also be true to note that the presumed shooter is, according to his online manifesto, an anti-conservative environmentalist who says, “We were born from our lands and our own culture was molded by these same lands. The protection and preservation of these lands is of the same importance as the protection and preservation of our own ideals and beliefs.” He says, “sure,” he’s a left-winger and maybe a socialist, “depending on the definition,” but explains that he rejects conservatism because it’s “corporatism in disguise.”