With regard to why men are moving out drifting away from the Democrat party, is it really such a mystery? I don't think its so much that they love Trump (although that's certainly the case for some), but they are routinely dismissed and insulted by those on the left. Check the progressive lefty ladies on The View recently:
Exactly. Especially for white men. The Left has been calling us "oppressors" for decades.
When I think of this issue, I think of the word "privileged."
If you want to alienate tens of millions of working white people, particularly young men, then tell them that they're privileged. Tell them when they're struggling to pay bills and hoping they don't get evicted that they're "privileged." Ridicule them while they feel the despair of working two jobs and oh, while you're at it, tell them it's their fault that non-white people are struggling and that they're racist for feeling hopeless.
I know this because I was there myself. Had an entire political party had laughed at me for working a backbreaking blue collar job while my home went into foreclosure, my response to that would be obvious.
This is just one of the many catastrophic failures the Dems have committed over the last 20+ years. The only reason I don't engage in many criticisms of my political side of the spectrum is because the threat to our democracy is very real, so other issues are on the back burner.