shall I presume many of you have no objection to being called ‘nazis’ in the standard twitter-left definition

I didn't know there was a standardised definition, or that it was somehow political-side-specific. If I were to steelman this then this could be about a pedantic distinction between a fascist and a nazi?

Hey, you know what you can do if you feel bad about being called a nazi? STOP BEING A FUCKING NAZI.

Shall I treat all drunk sex as ‘rape’ because kidnapper-rape and frat-sex have the commonality of reduced consent

Yes. Yes you should. Hey, see, you understand this! Also consent either is or isn't, there's no "reduced consent".

Shall I treat your remarks about this-or-that group as ‘hate speech’, or ‘violence’, in the form of speech?

Emm, depends on the remarks? If they're hate remarks then ye dude, that's what the word means?

Clearly, we have some sense by which concept creep exists; by which definitions can be stretched dishonestly.

Ye, like how you would define "censorship" I'm sure