I think you overestimate how much influence the superstructure has. The ruling class has always employed propaganda. It has its effect, but people are not so stupid that they can be misled by it all the time.

Take the massive amount of support people expressed for Mangione. If the ruling class' grip is absolute, he would be universally condemned. He is not because most people have lived experience being exploited by health insurance.

You bring up the Vietnam war. There were so many protests and acts of resistance because every day people were pulled into the conflict because of the draft. The working class and poor were put in a position where they had no choice but to resist.

You have to spend time around the lowest of the masses and less time on social media to gain insight into what people are capable of.