Solipsism is a trait found in liberals I have known - the rabid, angry and raving type (I soon reject their acquaintance).
They think that everyone wants what they want - capitalism dumped in favor of socialism, no private ownership of guns, celebration of all things gay, no limits on sex, contraception and abortion and a seat in the church of climate change. All of us here in America and all of those other countries who reject their views are seen as unenlightened, and really want those things but don’t know it yet. Once we have them imposed upon us - by force - we’ll see the light.
And one of them gets elected to the highest office in the land. Twice. Not good.
Those liberals you’re talking about believe anyone who doesn’t agree with them are stupid. Kinda’ hard to have dialog with someone you know thinks you’re stupid.