I'm afraid the traditional way to "deal with fascism", has always been the same: war.
People seem to naturally tend towards siding with the "strong side", and the only way to make them side with the "compassionate side" is to periodically turn their daily existence into living hell. We don't seem to have yet found an effective way to educate and keep new generations on the "compassionate side"; hopefully we're getting closer, but clearly we're not there yet.