Looking back its crazy how dumb boomers and ever their forefathers were to fall for this shit. Its literally trying to bogeyman the obvious truth due to extremely retarded and unrelated "muh genetics" strawmen that doesn't even understand how genetics works. Its as stupid as saying "damn those arabic supremacists" during the islamic golden age, or a better example "damn those italian supremacists" during the roman empire. They are obviously correct statements of truth during their time, to say that refutation and even stigmatize it is literally just cope from haters. They are better than you due to long-term factors of their ancestors leading to golden ages. "But muh genetics", again genetics is 99% adaptation to environment and 1% random chance, and while there are some natural environmental adaptation that is beneficial to humans, its so minor to not matter in the long run. For all the major empire periods in the world (egypt, classical, islamic, european) none of them had major advantage of genetic adaptation or random genetics. The best example of seemingly random genetics is something like china, with the highest iq scores and by far the earliest invention of the printing press, gunpowder, and compasses. Yet despite this they were still the silver bitch boy of the world living in a stagnant dream more concerned with larping as the best empire in the world than actually being it. Comparatively, europe didn't even have a writing system before the romans invaded our shit, and we were more savage, barbaric and uncivilized than most people anywhere. "but whity power is real", again its mostly placebo due to god-tier culture, yet there is some minor genetic superiority from whites, just as there came about minor genetic superiority from romans or egyptians, and that was from Artifical Adaptation.
So tl;dr, whites are supreme due to being better than everyone else, whites are better than anyone else due to skill issue from ancestors + themselves due to god-tier culture/philosophy/theology. White genetic "superiority" is almost entirely from artificial adaptation due to ancestors being better at sweating and bleeding than the rest of the world.
"White supremacy" is laughably dumb and incredible coping as a bogeyman and its amazing (((they))) ever managed to stigmatize it.