Really? You haven't seen any offensive chinese/asian "accents"?
> I doubt most people could identify Farsi readily enough to understand the propaganda
We generally mock them as sounding arabic with harsh guttural sounds. The exaggerated "phlegm" in the throat sounds.
> I don't think all that many people could tell you if they're looking at Chinese, Japanese, or Korean text;
Does it matter?
> Two of these languages' countries are basically universally beloved in the U.S
Which two are universally beloved in the US? Certainly not japan and korea...
> so it'd be hard to make visual (or even audible) propaganda out of it.
You can... But we just assign the propaganda towards "north korea" because we want to sell movies in china/japan/korea.
http://articles.latimes.com/2011/mar/16/entertainment/la-et-...
There most definitely is an anti-russian, anti-china/asia, anti-iran/middle east/muslim, etc "sentiment" in the US. Just because you know a few cosplay fanatics doesn't mean the US "loves" these asian countries. The truth of the matter is that we view them as competitors at best and enemies at worst.