I think it's probably something like this:
Sweet grew up somewhere with no liberal influence at all. None. His concepts for liberalism were all mostly shaded in racially-charged hues, because that's how local politics work on the outskirts of 62% black Memphis (
http://en.wikipedia.org/wiki/Memphis,_Tennessee#Demographics).
He would have seen a lot of cynical shit. A lot of pandering and a lot of hypocrisy on both sides of the racial divide, and thats at the State level so you can imagine how grimy the street-level hood rats (of any race) would be. Still, this was far off stuff, not actually local, in the same way that when you live in a rural area you get the local news from the nearest big town. So he didn't actually see most of these inner-city welfare queens he was so angry about, but he'd frequently hear all kinds of sensationalized crap about them second hand.
Then, ofc, all of his news and conversations would have been conservatively biased, so he would have seen the worst in everything local democrats did. This would have culminated in Bill Clinton ascending to the Presidency from Governor of Arkansas, which probably confirmed all of his worst fears about everything. I mean, here's a guy whose only basis for reference is "white people politically appeasing the blacks". He would have felt that about Little Rock just as much as Memphis (here's Tennessee's governor at the time, I'll save you the click; it's a white guy
http://en.wikipedia.org/wiki/Don_Sundquist). It doesn't matter if it's factually true or not, this stuff was fed to Sweet through FOX News-style AM radio programs and the Limbaugh show and so on. His truths were formed for him.
So, here's a guy who knows jack shit about politics other than that, as a white guy in the modern South, he is totally a victim of racial... something or other, he's not even exactly sure he just knows that people smarter than him have told him those "lazy, good for nothing blacks" owe him something. Of course, if you asked him why he hates the blacks he'd eventually say something similar to "They think everyone owes them something", but awareness of that sort of hypocrisy obviously never enters his head or we wouldn't be discussing him here.
So this guy goes to college, and boy, are those professors stupid. They think joking about "those dirty blacks" is un-PC. The 90's were all about throwing PC out the window, so John Sweet decided he was going to enlighten the campus with his oh-so clever and super-subtle racism. I mean, before that all the racism he'd heard were literal "She-boon" type jokes so, just making snide comments about Moeisha was sure to slide under the radar, and if it didn't, well, it was college, he'd just impress them all by proving that he was the most open minded person there because he was the only one who was being "honest about race". I mean, it's no different to the sort of honest reality a comedian would be applauded for sharing. Everyone else was just trying to cover up the clear facts about blacks being vaguely, and obviously, inferior.
And so he goes to the only semi-liberal place in the entire fucking North-East of the state, and he posts the most stupidly inflammatory ass-showing shit he can until they shitcan him, and since this is the only place he's ever been that didn't approve of his coon humor, they're clearly these citified liberals he's been hearing so much about, these self-hating white people that need to learn the right people to hate. They hate their own whiteness so much, that they hate John Sweet's whiteness too. It's the only way he can explain it to himself. The concept of moderates, of people who just don't want to stir the pot, doesn't even occur to him because he's always hated blacks on some level, and that hatred was, silently or otherwise, always approved by those around him.
Until ASU.
He finally reached a place that pushed back, and it pushed back hard.
Every small bureaucracy can be a nightmare if you're on the wrong side of it. You don't want to piss off the local sheriffs office or the mayor. You don't want to get on the radar as a pest to someone who has actual power and can idly make your life miserable. Once Sweet got his nuts caught in that college administrations vice-grip, he was well and truly stuck. For once he'd made an actual enemy, the sort that you can't get around without some kind of real world political pull, which he and his goofy-ass mannerisms had no concept of. He had fucked with authority and the authority had challenged not just him, but his entire worldview. Sweet learned, crushingly, that somehow, against all odds, the one glorious place he'd ever found in his entire life had rejected him wholesale. Spat him out and ordered him never to return. The kicker? Jonesboro, AR is over 70% white (
http://en.wikipedia.org/wiki/Jonesboro,_Arkansas). He probably thought he was at least half preaching to the choir, and instead the choir kicked him off the pulpit.
So, he goes home, and there's no computer. Who has the computer? The state. Who ran the state? Bill Clinton and friends. Bill fucking Clinton just fucking took away Sweets access to a CD-Burner. And Bill Clinton ran the country. It was all connected. Rush was right. It all made sense. He'd finally brushed up against the evil liberal media machine he'd heard so much about.
And that's when Mr. Sweet started plotting revenge and turned into the comic book drawing comic book villain we know today.
That's my theory, anyway.