>>720697523
There's a peculiar subset of people with a psychological quirk that we could call zealotry.
Now, these zealots have always been with us throughout history in a number of different roles, they're high energy, emotionally unstable, often paranoid and mistrustful, and become obsessively attached to the cultural mores they are exposed to, commonly revolving their entire personality around them and generally being dogmatic. In years past, you would see them lynching blacks in the USA, donning the role of religious inquisitors hanging apostates and witches, hunting down communists during the height of the cold war, and yes, you'd even see them in Nazi Germany, and across the battle lines in Soviet Commissars, among many many other examples for literally thousands of years.
In today's world, they are the political activist. Normally you'd barely notice a zealot, you'd read about the shit they were doing in the news on occasion, but this is because they weren't able to congregate and talk to each other before, they're pretty rare compared against the apathetic, well adjusted majority. The internet has changed all that, they have reach, they can network with each other, they're exposed to much more information in their formative years.
So why are they so upset about Nazis being depicted at all? The answer is that WW2 has become the modern West's founding myth, with the Nazis assuming the role of the demonic, and Hitler starring as Satan to draw a useful comparison. Since it became the prevailing culture, the zealots in the population latched onto it, and latched onto it hard. Since a zealot is unstable and highly dogmatic, they are irrational enough to truly believe that mere depiction of their enemies is endorsement, but they're not rational enough to argue against it properly, their paranoia drives them to believe that if the very idea of "evil" in their mind isn't destroyed and its memory erased, then the apathetic majority will choose it every time.