Without getting into specifics:
the way you beat fascism, is to make it cost more to be a fascist, than nazis are willing to bear. You folks saying "you can't ever eliminate fascists" are right, but you're missing the forest for the trees. Nazis hiding in their basement talking about how oppressed they are with other nazis, is still fascism, it's just not relevant. It's once they get out of the basement and start accumulating power, that we got a problem.
Making nazis afraid, is how you win.