Just a wild guess here but maybe she meant propaganda that mostly incites people to oppose tendencies or groups rather than to support their own?

Oh and facts can be propaganda too and often are… In a universe with infinite facts, the ones chosen to be presented vs the ones chosen not to, the way the fact is framed in discourse and what is being suggested by presenting it… That’s where propaganda lives.

It’s more comfortable to think propaganda is about lies. There are a lot of lies of course, but most important is what is assumed to be understood as common truth when sharing a message. Subtext is everything.