This tendency to call everyone a Nazi is a very strange phenomenon in the USA. I think if Americans really experienced the atrocities of the Nazi, mass death camps, shootings of civilians, tortures - they would hesitate before they used this label against someone they don't like or whose views are different than theirs.

More realistically in the current USA, you know you are extremely privileged when you're more afraid of being labeled as a Nazi than actually being harmed by one.

Or, you have an unusually strong reason to fear being labelled a Nazi, like you are a vocal racist who attends public demonstrations carrying or dressed in Nazi accoutrements or attire.

Or, you just have irrational relative levels of fear between those two outcomes.