The problem with modern debates is that they are not honest representations of the subject matter. They are exercises in tactical bullshit, meant to be rapid-fire, points-winning pseudo-arguments instead of constructive, intellectual discussions of the subject matter.
The only way for such an absurd system of beliefs to exist is to either rely exclusively on morally bankrupt individuals, or to heavily lean on confirmation bias and reject any anti-racist ideas.
Simply said, own supremacism feels good. Even if you know it is based false argument it can still feel good. Compliments do feel good even if false. It is definitely not a threat.
Also, my own supremacism is practically beneficial to me. I gain from that even if if is based on false arguments. That makes the supremacist arguments much more easy to accept.
> The "debate" on racism was lost a long time ago.
When is the last time you asked someone who is a strident racist to explain their ideas in the form of a full essay or 30 minute presentation? Have you ever seen this done without the implicit or explicit assertion that the target of their animus is a lesser human or perhaps not human at all? Anyone with two brain cells to rub together -- including and ESPECIALLY impressionable young people raised in racist environments -- can see the absurdity of such an argument. The very act of exposing the ideas to open discussion and forcing the proponent to defend them with logic and reason is what ultimately undoes them. Will some still recalcitrantly cling to such ideas? Sure, but that but by that point it will be clear to anyone paying attention it's not for a reasonable purpose.