You don't have to tell me ice in my drink isn't going to "fix" "global warming". I'm pretty sure Brother Chris is rational enough to know that Phillip Morris isn't going to miraculously campaign against abortion to get him to start using tobacco again. The people in the video were giving up Coke and ice cream desserts, things they should probably do anyway, to stop abortion.
I was more wondering about other peoples' irrational rationalities, the habits of the superstitious agnostics, the 'false martyrdom' people impose on themselves. We all have a pretty good idea of how to change laws or otherwise get things done in this country, but a lot of us still either a) have a habit that we arbitrarily associate with or justify as a political action or b) have a political cause to which we whimsically ascribe some of our actions.
Belief is kind of beside the point, 'Do you partake?' is more the question. I'm assuming your answer is "No".