The Scientology “Knowledge” ad is trying to make you buy something, whereas the Dodge “God Made a Farmer” ad is trying to make you believe something.
That’s an incredibly important distinction.
Scientology wants to sell you a product with its ad. Sure, it happens to be a set of beliefs, but the ad is still just a glossy sales pitch. (The beliefs come later.) All it wants you to do is buy Scientology, and that’s why it’s marketing disguised as propaganda.
Dodge, on the other hand, doesn’t want to sell you a product with its ad. The truck is for sale, of course, but that’s not the point. The ad exists for the sole purpose of reinforcing an American myth about farmers that can be co-opted for brand identity. It wants you to believe in the myth, and that’s why it’s propaganda disguised as marketing.
For the record, propaganda disguised as marketing is infinitely more insidious than marketing disguised as propaganda.