Back In My Day

there's always been propaganda

Propaganda is like food. Sometimes there's a plentitude, other times a famine. Better yet, some food is healthy and some is harmful. So goes propaganda. I don't mind "propaganda" for healthy lifestyles and objective truth, but I don't like propaganda for modern idiocracy.

so you're saying propaganda has a place in education

When I say that the old schools taught fact and not opinion, I mean that they taught the very obvious truth (2+2=4) and also the very obvious ideas like that politness serves you well and that everyone needs to pull their own weight (both being provable from events in history and daily life). These ideas could be called "opinions" or "social conventions" and thus propaganda, but they are so well proven by events that you might as well call them facts. The twisted ideas like total gun control and open borders that are now being taught are the bad propaganda because they have serious arguments against them which pretty much outweigh the arguments in their favor and because they are being intentionally spread for the benefit of a private party. It is the bad propaganda that has no place in education, not the "good propaganda" that consists of ideas based off solid fact.

this is a case of facts being presented as opinions and vice versa

Just as you can prove your facts, you can prove your opinions.

Your previous paragraph demonstrated that what you were taught in school as facts, are considered "opinions", and your argued opinion is what you want taught as facts.