The closest word I can think of is a sycophant but that’s too strong word and not exactly what I’m looking for. The word I’m thinking of has negative connotations and it’s for someone who is friends with different groups but only at a superficial level and isn’t necessarily honest about who all they’re friends with. This person would be seen as untrustworthy.
Given how out and proud the sentiments are expressed, the friend can’t say they didn’t know… I wouldn’t waste much time trying to have them see reason. You don’t accidentally join a dinner party where everyone else is a white supremacist, or an anti-vaxxer, or where everything they don’t like is woke and thus should be eliminated.
Either way I said probably… Which would likely follow as certainly after an attempt to see if maybe they have been wilfully ignorant (still not a good look).