It was a CLASS THING...nothing more. Lots of it here, too (hence my tag line).
They literally HATE US and they immediately figured out that Trump was one of us. And it wasn’t hard to figure out - when Trump was young (teens and adults) he would often visit his father’s worksites and have long talks with ‘the workers’ (they spoke English back then).
To them doing that was no different than going down in Caste level in India, so they wanted NOTHING to do with him.
Bingo! Purist “PHARISEE” conservatives hate him because he wined and supped with the unclean publicans.