It's impossible for the man to share just usual human things. He'd rather die.
He will literally push his educational, political and economical views into every mundane conversation. Buy a butter; tax is theft. Take kids out; vaccines cause autism and cancer. Where should we go for vacation; it's all lies and pyramids we're used for making electricity.
He wouldn't drop a thing when we visit my family, and in the end of such day he's all sweaty from just a chitchat๐๐