I didn't talk to Arbcom (don't even know the procedure). Yes they are all more or less brainwashed but they can be educated. Think about it: if someone can be indoctrinated with "bad" ideology, they can also be indoctrinated with "good" ideology! Well, perhaps not them but their kids (this is where wiki comes into play), but the principle still holds. Here it's all about collecting sources and if they persist if POV pushing just report them and au revoir. I've looked into your case but don't understand why you were banned from editing at all. Next time just use talk page to announce your modifications to articles. I think I'll compile something for Croats from Fine, Kordić and Bukowski, they would be good for start. I keep running away from these topics but they always somehow pop up. When you leave such articles on their own they inevitably get corrupted but POV pushers.