That is true. The problem is we find ourselves appearing to side with some really nasty individuals. Some Americans just cannot get over that hump that we must defend the right of free speech of the worst or we are not defending it at all. That means a person has a right to claim the Holocaust did not happen. And I have met such people and its not a great look.
First they came for the Holocaust deniers...
That would be free speech.
So you want this both ways?
What are you afraid of? That you can't prove that it did happen?