I agree with and disagree with you on the shifts you've laid out. I agree that a shift happened, but I disagree that it was the Democratic party. In my opinion, it was the baby boomers who have made that shift from anti to pro war, anti education, and anti liberties.
You know, the hippies.
And I can see how a boomer like Junior would conflate the idea of the Democratic party and his age demographic. His peers when he was young were very anti-war. And as that group has aged, they've become very pro-war. And how they are the group that is the most anti Gay, anti Trans, and disparage modern education.
The common core math freakout is an example. There's more than one way to do math, and demanding that everyone do long division in exactly the way it was taught back in the 50s is just assinine.
Who escalated the Vietnam conflict? That was JFK and LBJ. Both of them Democrats. So, saying the Democrats were anti-war isn't accurate. Were the baby boomers when they were of draftable age? yes.
And as to why the party left him? Things like Wi-Fi causes brain leakage were kooky and a bit eye-rolly, but today? That's some anti-science nonsense and that needs to stop.
And since he refuses to engage in a factual data-based reality and keep on with his conspiracy theory nonsense, that party left.