Maybe Milo isn't really a white supremacist.
Maybe he's just someone who has no morals whatsoever - and I mean that without the slightest exaggeration - who decided to team up with white supremacists to further his career.
Maybe he's someone who cares so little for other human beings - not just people unlike him, not just people he doesn't know, but literally everyone who isn't him - that he's willing to throw homosexuals and Jewish people under the bus to further his career, teaming up with people that he knows hate people like him, that he knows hate him specifically, because he also knows that he can further his career by being a useful idiot for them. As long as he's kept safe by his usefulness he doesn't care.
If that's the case, saying he isn't a white supremacist is such a valueless statement. It's a pointless splitting of hairs. Maybe he's not, but he's so totally apathetic to others that he's racist to the absolute, he's homophobic to the absolute. He has absolutely no concern for the suffering of these minorities or of any other vulnerable group and is willing to exploit that suffering to his own benefit. The only person left that he cares about is himself: and, funny enough, that means that the only person in that pool is white person.