Musical innovator? Sure. Ahead of his time? Definitely. Culturally prescient? Uh-huh.
Annoying? Ohhh yeahhh. As an attention-getting device, "is he or isn't he a Nazi" almost beats G.G. Allin's "is he or isn't he going to kill me on stage". This way to der Egress! Also, hail Satan, etc.
But he did sort of invent modern electronic noise music.