If you think you've expertly dodged the propaganda firehose, you are wrong. If you think propaganda is all the stuff you disagree with, you are wrong.
The most sinister propaganda starts with a kernel of truth you believe in, to distort your behavior toward things that are self-destructive. It's not just right-wingers that fall into that trap.
"Follow your heart"-style political involvement can leave you prone to manipulation by people you despise. Then before you know it, your ideology has become something akin to opposing the Allies because they're no angels