Given unlimited men, one of them will invent fascism. Certainly fascism is not a natural state of affairs, though.
Even a communist state will need to take measures to prevent the proliferation of fascist ideology, because let's be real it's really hard to "start fresh" by somehow killing all fascists, that's not feasible in real life. So the above point is moot anyway.
Isn't that unironically what Gunther the balkinizer was calling for this morning? Jesus christ.