I think another factor in Hollyweird's torpedoing of Kerry's campaign was that these people are *entertainers*. They can't just express their beliefs in rational, thoughtful, logical arguments. They have to all be more dramatic and 'quotable' than the last.
Their own self-centered, ignorant natures were highlighted instead of the what ever drivel was pouring out of their mouths.
After all, that's what writers are for, right?