The problem with movies that are not explicitly leftist is that wormbrained viewers will misunderstand the message or side with the bad guy. You can’t radicalize somebody with consumption.

This is definitely true -- if it's a movie about a corrupt powerful government, people will watch it and say "Yep, this is what life would be like under socialism." If it's about a conspiracy of people (or aliens) controlling the world which are supposed to be a metaphor for capitalists, people will watch it and think it's about the Jews. I think They Live and Network arguably fall into this trap, and we all know there's an audience that doesn't notice (or doesn't care about) the satire in Starship Troopers. Dr Strangelove is a bit more difficult, but I could imagine someone watching it and saying "Yep, that's the problem with big government bureaucracy getting in the way of swift, decisive violence."

Of the ones on your list, I think Full Metal Jacket is the hardest to misinterpret. It's harder for me to imagine someone coming away from that movie thinking it's pro-military or pro-war.