Both sides?
It's impossible to have a logical discussion with a toad stool.
You might as well attempt to negotiate with a goat.
When asked for specificity of his goals, he won't provide any.
When asked to supply evidence for his outrageous claims, he'll ignore your polite request.
When asked to supply contradictory data for your evidence, which he asserts are "lies," he'll pretend his unsupported assertions are all the evidence that's required.
He either fails to comprehend the rules of evidence and debate, or is just so thoroughly dishonest that he believes the rules don't apply to his side.
Honestly, I believe it's a little of both: since he's indisputably not only a racist, but a zealous member of a race-cult, he believes his race is special, and that every other race is "evil." He believes he belongs to a race of angels, and that the other races are devils. Therefore, he doesn't feel bound to deal honorably with anyone of any other race, and that any evil done by the "angel race" to the "devil race" is justice, and that any justice done by the "devil race" to the "angel race" is blasphemy.
It's truly a depraved philosophy he's bought into, and if you think you can talk sense into him.... you'll be disappointed. What he needs is deprogramming, not debate, the latter of which he's incapable, anyway.