I would imagine these models heavily bias towards western mainstream "authorative" literature, news and science not some random reddit threads, but the resulting mixture can really offend anybody, it just depends on the prompting, it's like a mirror that can really be deceptive.

I'm not a liberal and I don't think it has a liberal bias. Knowledge about facts and history isn't an ideology. The right-wing is special, because to them it's not unlike a flat-earther reading a wikipedia article on Earth getting offended by it, to them it's objective reality itself they are constantly offended by. That's why Elon Musk needed to invent their own encyclopedia with all their contradictory nonsense.