The shame white Liberals feel about Trump is the result of white guilt plus not wanting to acknowledge it.
The West grew rich and powerful on slavery, land theft and pillage, carried out by the likes of Trump: entitled bigots. But since the Liberals want to feel better than that they need to ridicule and distance themselves from Trump.
But in many deep ways Trump DOES represent what America and the West are: an entitled, shameless rich guy that thinks he owns the world.