"Render unto Caesar what is Caeser's" is for suckers.
I'm not sure why I'm making this defence of Jesus. I don't think he existed but your statement seems designed to paint Jesus as a supporter of tyranny which I don't believe follows from the quote and its context.
What his "followers" have gone on to do? Heinous, reprehensible, appalling. No question.
Not at all. But rather to point out that the right thing to do isn’t always obvious.