No, they just think you are fucking stupid for being so dedicated to an ideological principle that you allow people whose goal is to destroy your ideology, and even your life, the means to their end.
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Indeed. And in a handful of cases - Nazis being one of those - this is perfectly justified by actual history in which millions of people died. Not some ideological principle achieved by navel gazing on the part of a bunch of old geezers a couple of centuries ago; Actual experience of mounds of corpses.
So you think the way to defeat them is to become them. That's why I don't support banning ideas. What Nietzsche wrote about fighting monsters and possibly becoming a monster wasn't "this is how to fight monsters", it was "be careful to not do this when fighting monsters."
If you really cannot see the difference between saying 'You will be fined if you persist in promoting Nazism', and rounding up people for extermination on the basis of their ethnicity or ideology, then I feel very sorry for you.
Limiting the freedom of people
to be actual Nazis is not 'becoming them'. Only someone blinded by staring too long at the brilliance of his own navel could make such a dimwitted claim.