> As if Neo-Nazis were and are the only people capable of authoring propaganda

Of course they aren't. But that's no argument for distributing it.

No, the argument for distributing it would be that other propaganda is widely distributed without question, so if one wants to arrive at anything even close to an objective account of what transpired during that time in history, all propaganda should be examined and learned about. The truth usually lies somewhere in the middle, and we certainly aren't getting to it by blindly accepting one narrative over another.