Only one side of anything being propagandised is effectively a non-existent concept. Propaganda is simply promotion of an opposing idea. People tend to equate the term with outright lies, but propaganda is far more often truth that’s specifically chosen to influence opinions in a certain direction.

The very notion of “only one side” propagandising is, in and of itself, propaganda (and in my opinion, a very common form of it, one you’ll find much more egregiously used in US politics). I was simply pointing out the irony without meaning any implications to either side.