If we can joke about cops (reno 911), bar owners (it's always sunny in philadelphia), rural americans (king of the hill and many, many other), canadians (south park), italians (euro trip), gingers (south park), nerds (pretty much every college movie), french girls (malcolm in the middle), middle managers (basically, every office-based movie), bodybuilders (brooklyn 99), "aspiring actresses" (working as baristas), student cooks (usually by gordon ramsey), .... why not us? Oh and let's not forget blondes.
Do you assume all italians wear stockings and molest other guys on trains if you've seen Eurotrip (movie)? Nope. Do you assume all french girls don't shave? Nope. So if the whole of the balkans, including bosnia has many many jokes with "Mujo and Haso" (they represent a "stupid" couple of guys, where the pun is in their stupidity, why do you (I assume you're not from the balkans) get to be offended for other people? There's even a movie just with jokes about them... made by bosnians of course - https://www.imdb.com/title/tt5085118/
We also have regional jokes, where in slovenia, people assume that people from gorenjska region are stingy (in serbia, it's people from pirot).
A joke is a joke, you don't have to get offended for other people.
edit: also, we don't start wars because we thing the others are subhuman, we just stereotipically hate eachother (as groups, not as individuals), due to historic reasons, mostly war-related.
ps: What you americans would call racism could only be mentioned maybe against gypsies here (eve though they're techncally the same race). And even that is mostly by assuming, that if someone stole your gutters around the house (or basically anything metal), that it was the gypsies. Usually it's even true.
But what do I know I'm just a PC SJW you know how we are, constantly bitching about "no more violence", incredibly naive because of course there will always be pogroms, "it's just human nature". [canned laughter]
Or if you're going the SJW way, are we only alowed to joke about american white men?
I'm a slav and from the balkans, we're either portrayed as tracksuit wearing thugs, drunks or in some relation to the balkan wars. So what?
We even have our own comedy tv series playing with the stereotypes (eg. Kursadzije), where all the stereotypes are used all the time (serbs and croats have historic "issues", montenegrins are lazy, bosnians are stupid and slovenians are femboys)... people like this, they laugh at this, and watch it, in all of the mentioned countries and wider.
Somehow it's always "someone else" that gets offended... same for 2balkan2you subreddit, where a (probably american) admin doesn't get the difference between romanians and roma/gypsy people.
Even with games... stuff like gta 4 just makes people trying to guess what Niko tried to say, because his serbian/serbocroatian accent/pronounciation is horrible in the game.