it's just another anti-mainstream movement which has simply made a mainstream of its own
That happens to a lot of music styles. Just because certain people in a group who listen to some of the same music are jackasses doesn't mean the rest are, especially if they are kids.
I know more than a couple people you could call 'Juggalos' who are nearly respectable individuals. Of those who dismiss what Psychopathic Records produces as garbage, most probably havn't even heard the music to the extent that would warrant judgement.