He is neither a Nazi, not a eugenicist. He fought the Nazis for five years, so that accusation is particularly offensive.
Yes, he has said that if reincarnation existed, he’d like to come back as a virus, and I can understand why that offends somebody, but it has nothing to do with eugenics. It’s an position to do with overpopulation - that the world will reach a stage where there are so many humans we can’t support ourselves.