Why do the lower classes embrace political correctness, multiculturalism,diversity, etc.?

Hank wrote:
> One opinion has it that these folks spend much time in front of a TV
> set absorbing a constant barrage of propaganda. Touchy-feely shows,
> "serious" programs like Oprah and Montel Williams. Most of these
> undereducated folks are not dumb. They have normal basic intelligence.
> Perhaps a lack of advanced formal education diminishes their ability
> to make judgements based on history/current events. Another widely
> held view is that these lower class folks think that by embracing
> apparent "political/social correctness" that they will be transported
> up the mythic social ladder. What fools these mortals be! Rest assured
> that families in positions of power and prestige strictly stay in
> tight tribal orbits.
>
> Will

Well, come on now Will. Surely you can think of something to say.
Please feel free to tell us your sources of information.