Fuentes is that guy. He openly discusses and jokes about how the death camps couldn't have existed (using terrible "logic" of course). That's why he was banned from every relevant social media... until Elon unbanned him (hmm)

Spencer is no less of a Nazi though. He just better understands what you can and can't say publicly while maintaining the thin veil of plausible deniability. He does all the Nazi saluting and support for a white ethnostate... but usually not right out in public. His public persona is more dogwhistles and coded without directly saying the things all the time.