Propaganda doesn't totally rob people of agency free will (more accurate term), if it did this site wouldn't exist. People do have the capacity to develop critical thinking, skepticism, and a basic curiosity about the world that allow them to develop some resistance to propaganda.
You can hold people accountable for failing to even attempt to do this.
Takes minute differences I guess. I got radicalized through cycling, which is an innocent enough thing to pick up on it's own. But I eventually noticed that hey, every institution and law that's supposed to make this not deadly is smoke and mirrors and often actively works to fuck you, maybe these other people complaining about such issues have a point