100% this.
I think it had been building for years due to ever increasing numbers of people behaving badly behind pseudonyms online but the majority of asshats still maintained the illusion of not being asshats. Trump’s first ascendancy gave all those closet asshats permission to no longer care about maintaining illusions.
When it looks like a duck and quacks like a duck…
The trumpnazis are literally taking signs, symbols, gestures, modus operendi, et al from German nazis. It’s not wrong to label nazis, “Nazi.” If you wish to be pedantic then by all means, trumpnazis would be completely accurate.