I am sure the parents of Otto Warmbier [0] could disinfect your disbelief in the harsh light of their reality.
Some foreigner came into their country and tried to 'illuminate' the 'unwashed' masses via tearing down propaganda and was promptly thrown into some hellhole of a jail.
Seems to me like a normal thing to have happened. By the standards of the Global North, that is.
Doesn't seem meaningfully different from today's USA.
I'm mostly trying to make light on the fact that trying to validate outlandish propaganda by using an event which actually happened as some kind of 'gotcha' falls flat when the event you're talking about is something that happens routinely in the USA and, more generally, in the Global North.
If I went to the USA and took down a MAGA poster, my ass would be in Alligator Alcatraz 2.0 within the day and nobody would ever find me again. At least until I land in South Sudan or some shit.
Sounds like the most innocuous thing in the world