I have to disagree. IMO, it's because his personal belief system and his personality provide the opposition too many sound bites to paint Conservatives in general as less than intelligent and/or bigots.
Burn me once...shame on you. Burn me twice...shame on me. DJT, Jr. is right.
You get a New York centric Mass Media who know all about the South because they watched Beverly Hillbillies and Dukes of Hazard, they're going to paint most anyone from south of the Mason Dixon Line as a dumb hick.
In some states, that's unavoidable, but the locals know better. In Moore's last run, the media campaign kept voters home with lurid tales of diddling little girls. Now that the truth is out, he just might fare a bit better. I'd vote for him, but, dagnabit, I'm one of those 'hicks from down south', (even though I live up Nawth and can't).