Godwin's on record saying it's fine to make the comparison sometimes.

https://www.esquire.com/news-politics/news/a56987/godwin-law...

> Godwin wrote on Facebook that someone had asked him to post a statement about Charlottesville, because people bring up his law to shut down arguments all the time. Turns outhe was happy to oblige. "By all means, compare these shitheads to the Nazis," he wrote. "Again and again. I'm with you."

> In general, Godwin has always said you can bring up the Nazis in an online conversation, as long as you're doing some research first. "If you're thoughtful about it and show some real awareness of history, go ahead and refer to Hitler or Nazis when you talk about Trump. Or any other politician," he wrote in The Washington Post backin 2015. But in the case of the white supremacists in Virginia, there's no research necessary to make that comparison. The facts speak for themselves.

there's a parable of a Nazi bar, that was made famous ironically with a tweet.

https://en.wiktionary.org/wiki/Nazi_bar

> From an anecdote shared by Michael B. Tager (@IamRageSparkle) on Twitter in July 2020. In the multi-tweet thread, Tager recounted visiting a "shitty crustpunk bar", where he saw a patron abruptly expelled. The bartender explained that the man was wearing "iron crosses and stuff", and that he feared such patrons would become regulars and start bringing friends if not promptly kicked out, which would lead him to realize "oh shit, this is a Nazi bar now" only after the unwanted patrons became too "entrenched" to kick out without trouble