1. Going bald
2. Marriage falling apart
3. Stuck in a low-paying, dead-end job
4. Hated America and its institutions
5. Was a nobody who wanted to be a somebody
6. Supported Castro and the Cuban revolution
7. The guy who stared down Castro and the USSR was coming to town
Check, Check, Check, Check, Check, Check, ...
7) I got the "stared down Castro" bit -- The Cuban Missile Crisis. (It's kinda interesting that Castro was really pissed off at Khruschev afterwards. LOL)
But uhh ... What do you mean by "the USSR was coming to town"?
-- MWT
PS I would add that, after living in the highly regimented, neighbors-spy-on-neighbors, consumer goods-lacking "Workers' Paradise" for 2.5 years, his last-chance dreams were broken, and by then he probably hated "hypocritical, corrupt" Soviet institutions and way of life, too, and that's why he decided to "speed-up/advance The Marxist-Leninist Dialectic" by killing JFK and getting "warmonger" LBJ into office.
It's all very Hegelian ...