I took a critical thinking class in university, which covered deceptive messaging from advertisements fairly heavily. I'd like to think they all came out of that class no longer able to be fooled by this sort of thing, but I know it isn't the case.

It's easy to get people to question advertising, because they aren't emotionally invested. Once you stray into religion and politics, people often stop caring that they're hearing plainly untrue, or even self-contradictory, ideas.