I saw that coming in advance. Very consistent with you searching for the word Nazi and I noticed you the other day (after your post) going through old threads not posted in. So, I am sure you have some memory and an impression, especially since we've argued before at length on opposite sides and it has gotten nasty. I am surprised, though, that this is the example you are going with as opposed to some other example of me being nasty with someone else being nasty.
All I can say is that in the moment I may have thought Derec's constant harping on blacks, Arabs, and taking sides against them even when objectively incorrect to do so, has led many in the forum to identify that as racism and xenophobic. A comment "Dein Kampf" which translates to Your Struggle is literally identifying that this is a constant emotional trauma for Derec as he is always getting upset by it, such as complaining about hordes of Middle Easterners being let into Germany. And of course the name-calling of black men like Dindu Nuffins and Thugs. Obviously,
Dein Kampf has a double meaning since it is also an allusion to Hitler's book Mean Kampf "My Struggle" written before he actually exterminated the Jews from Germany but while he was a very, very pissed off individual with tons of hate in his heart for people who are different and that he blamed for his own circumstance in life. The double meaning was directed to Derec who understands German with a purpose to get him to think though after I posted it I did think it was over the top.
Which brings me to the next point which is that you seem to not get that I brought up this thing in the context of this thread and it is not intended to be a conversation about me. The fact as I have already written in previous posts is that the world did not end when Jason Harvestdancer inappropriately 35 times negative repped me, calling me a racist, Nazi, fascist. Democracy wasn't over. From the op:
Something that happens often, when coming from the "left", but apparently when comging [sic] from the "right" suddenly makes us reconsider the use of the "N" word and if calling people it is somehow a threat to democracy. ... Apparently if someone from the "far right" calls you a Nazi, that's something that the police should investigate. ... So, is it actually a bad thing when a protestor calls someone a Nazi? Or is it only bad depending on who is doing it?
Again, Jason's calling me a Nazi was not a threat to democracy, not bad depending on who did it. Jason's op was anecdotal and presented incorrect generalizations based on such anecdote. No general rule.
Whether or not it is appropriate to call someone a Nazi depends on the context and the person being called a Nazi, not the person who is doing the calling. You are not often going to hear mislabels of Nazi directed at leftish persons because more often you will hear them called socialists, Stalinists, communists etc by the far right with the exception of perhaps what the right calls feminnazis. That's really the tendency going on, probably.
Besides this, there is an excluded middle, not being talked about. Inappropriateness is not a binary switch but has layers and is a continuum. For example, spamming someone is a Nazi 35 times is different than writing it once or even spamming someone 2 times. Likewise, calling a violent racist member of the terrorist KKK organization a Nazi is different than calling Nancy Pelosi a Nazi.
I am sure that these observations of analysis: an excluded middle, context, anecdotal evidence, hasty generalizations apply in some ways to the op. I leave that as an exercise to ponder to the reader as I am busy atm.