It's asserted upthread that gab isn't part of the wider network anymore, so that's objectively untrue, and "Nazi Twitter" is subjective, but a reasonable person could question it.
It’s not part of the largest network, as no big Mastodon server federates with it, but it is a Mastodon instance
“Nazi” is a racial slur for a white person that doesn’t hate themselves or their ancestors.
I can't believe I have to say this, but no, that is not what "nazi" means.
“Nazi” is literally short for NAtionalsoZIalistische Deutsche Arbeiterpartei.
Twitter is the nazi version of twitter, gab is the freedom version.