the part of the book where people didn’t get to vote until their term of service was over, but the people who could vote could vote to increase the terms of service indefinitely

What does that have to do with fascism?

I never finished Stranger in a Strange Land because I found it shockingly sexist

Uh, there are sexist characters, but they're supposed to seem backwards and regressive. It's supposed to reflect the sexism of the time in a way that makes it obvious why it needs to be abandoned.