Problem is "Nazi" = "Anyone who disagrees with me" in most Left-friendly spaces today. For instance: https://factually.co/fact-checks/politics/was-charlie-kirk-a...
None of his views had anything to do with Naziism but failure to fall in line with all of the Left's current positions makes one "a Nazi" to them. And yes, much the same way as right-wing extremists like to paint all 'liberals' as "gun grabbing Marxists." The difference is you can find a lot more liberals who would happily glorify Marx than you can find Americans of any party who would glorify the Nazi regime or its acts.
In case it's unclear, I do not support Nazis either.
Charlie Kirk was not a Nazi, but he was definitely a fascist.