Disabled kids in Korean public school

Ah Korea... It's all well and fine to have disabled kids (or mentally challenged) in your public schools but it should not be that way. For example today, some disabled kid went ape shit. He had so much anger in him and a wanting to destroy and hurt everyone. It was a non-pleasant experience to say the least. Now this kid as no reason to be in any classes since he can't follow anyways. The funny thing is that there are special classes for these kids in school - why they aren't all the time in there is beyond my comprehension. I keep getting told that parents want them to be in regular classes. What the hell? It shouldn't be their decision. The school or government should control this. There's a limit to how much someone can be part of the group even if this is Asia. I do understand that the parents don't want this though. I'm somewhat surprised at this liberty of choice regarding this matter in a country where there's such pressures to always conform to things. In this case it seems that they would want (or dream) that a disabled kid would somehow look and act like a so-called normal child. It's ok Korea there's nothing to be ashamed of - even Japan has disabled kids (yeah I had to slip that one in). Of course these kids are not always creating problems. Most of the time they are the quietest in class and also most of the time I'm really wondering who's the "normal" kid.