The character was two bit drunk who was dragged out of the drunk tank and hired to be on a radio program...
He was a nasty, narcissistic megalomaniac who managed to hide (for a while) most of his most reprehensible tendencies, but by the end of the movie people were falling away from him. That's what is happening with TFG. More and more, as he becomes more and more incomprehensible and keeps tossing word salads around onstage, people are drifting away. He is by no means "a master propagandist" as Salon extols, but more like those holy rollers you see on street corners in busy cities preaching to the passersby who are trying to get out of hearing range of their curbside sermons.
Don't get me wrong. I don't take him lightly. I (sadly) have lived in Texas all my life and I've always known (and known some of those folks) who would be happy to sign back into the Confederate Army if they were allowed to do so. I've never taken the likes of the George Wallaces or the northern versions of their ilk like TFG lightly. They can and have done a great deal of harm and the pendulum swings back and forth routinely in life. We make progress for a while, but it's inevitable that there's a backlash that takes time to undo. But I feel like there's the beginnings of a changing sentiment with respect to this despicable cretin megaphone mouth, and the more incoherent his rants become the more he's going through the great unraveling and people are beginning to see. He will always have a contingent following but they're beginning to dwindle (and die).