Ok fair point. But I think that just any level of critical thinking is leftist propaganda in a way. Science says there is a gender spectrum, autism is real, the climate is collapsing, our current economic models don't work, sociopaths tend to get into power, all of these scientifically verifiable facts are considered leftist. True art that asks you fundamental questions is leftist, because examining the human condition leads you to conclusions that abhor suffering. That can be graffiti or a scene in a Pixar movie.
I think my point is that the left don't need manipulative propaganda, because we have truth on our side. And if we were able to rally properly, that would be enough.