Earlier quoted context omitted.
The question is, what do you do when they gain power?
You prevent them from gaining power by winning debates against them and demonstrating to everyone why they're wrong. I mean have you actually seen the "science" used to claim even the existence of different races? It's all misleading statistics and pseudoscience. You group a bunch of people together based on geographical origin and then observe some differences in the averages between the two groups, ignoring that th…
"A lie can travel around the world and back again while the truth is lacing up its boots."
It doesn't matter how solid your facts are if people are listening to vox pops of people who back their own internal beliefs.
> There is no way for a Nazi to win that on the facts because the facts are against them. Which is why they have so little actual support.
They don't need support, they just need an echo chamber to be encouraged. Pop onto stormfront and try convince a handful of posters there and see how far you get.
> There are probably more trolls pretending to be Nazis than there are actual Nazis.
If x% (where x is some suitably small number) of a group are the only ones who truly believe it, and the rest are just trolls, then increasing the population size leads to both more trolls and more Nazis. It also doesn't matter to anyone whether the person spewing vitriol is actually a Nazi or a troll when the abuse is directed at them.