I have a theory that conservatives, by their nature are resistant to change and humor because of an inner trauma in regards to their youth.
Somewhere along the line, they felt Uber helpless as someone laughed at them and called them out or otherwise insulted them in just such a way as to permanently flip their idea of humor.
They find discomfort in laughing with people, but find it malicious to laugh at others for perceived inferiority.
These days narcissism is a catch all term for it, but when humor is seen as a weapon and not a joyous activity, i believe that is why conservatives are such in a defensive loop.
(This is how i am and i won't change it. It was all great until that trauma!)
So they're just resistant to most forms of humor that aren't absolutely safe to begin with... And end up being targeted towards an enemy.
Think of a jeff dunham show. It starts off without cussing and with silliness(peanut), but ends up with racial stereotypes(jalapeno), making fun of a dead terrorist(achmed), poking fun at rednecks (bubba) and bitching about the wife. (Walter)
Gotta ease into the insult humor of conservative mindsets.
Meanwhile liberal humor is about the plight of real life and sex, often. Self depreciation because we are okay with hating ourselves.
Which, perhaps is why it's so easy to find liberal porn. (Plz FuCK my wife and hate my dick size) as opposed to conservative porn. (Raceplay, gagging)
Just a thought.