A very good explanation!
I guess what PO’d me the most, was one of these fellows was bragging about how he kept his son in college for years and years while the Vietnam War was going on. He said it to my dad, right in front of me just after I got back from Vietnam. His kid was so over educated he became a university professor.
My theory about the leftist professors is that they are basically the same as the people I knew. They are all draft dodgers that evolved into die hard America hating leftist.