Do not argue with nazis. Do not argue with klansmen. Do not argue with the alt-right.
They don't believe anything except* (*edit) they are right. You can not convince them through argument that they are wrong. They won't 'see the light' or 'accept the truth' - they'll just scoff and dig deeper into their cognitive dissonance.
This includes your racist uncle. And JK Rowling. And Musk-fans. And that fuckwit at the water cooler.