I know these comebacks always come late, but you could say:

"So its OK to turn a profit off of the war in Iraq (cheney), but its not OK to make a profit by telling people about the truth of it (the movie). Regardless, money is how information gets out there "

The powers that be spend egads of $$ trying to get their version of the 'truth' out there - other people have to do the same.

However, I truly share your frustrations. My entire extended family (wife's and mine) are 'devoutly' (and I use that word on purpose) pro-Bush and pro Fox 'news'. AAAAHHHH!!!!!!