I don't. My partner and I share our views. Her family is left-leaning; and my FIL is or used to be a communist. Coming from a semi-fascist family, let me tell you, it feels pretty neat being able to just be yourself like that. It makes going back to the folks and having to play pretend all the more obnoxious.

I don't think I can give you any good advice because it's just too easy to irresponsibly tell the online stranger to dump their partner even though they're halfway into planning their wedding. I personally wouldn't be able to repress myself like that or act insincerely throughout a life-long relationship, but I can't say in good conscience that I'm certain about my judgement of your situation.

In any case, if you end up deciding to go on with your partner, I'd follow comrade @Navaryn@lemmygrad.ml's advice on "laying low" to buy yourself credibility and not get immediatelly disregarded as a crazy, for your own long-term mental and social health. Also other comrades' advice on talking about things on "historically neutral terms" so to speak.