Of course evil exists. There is no denying that. But you can't say someone is born evil. I, personally, wouldn't even call Cho evil, what he did was an evil act. But was he actually evil? He had a family who loved him, even if he was a difficult child. His family is mourning the death of someone they loved, while at the same time dealing with the shame of his final deed. You cannot blame society, video games, bullies, guns, movies, the parents, or anything of the such for his willingness to snuff out so many lives. No doubt under different circumstances he wouldn't have commited this horrible crime, but another person under the same circumstances, or even worse than his own, would not have done the same thing. It takes a lot to kill somebody. It takes a lot more to kill 32 somebodies. There was something about him that wasn't right. Does that make him the devil incarnate? I find him to be more tragic than purely evil.

And to show I am not in "fairy princess land", here is a quote from my very first comment in this thread:

"Can't we just take responsibility for our own actions? Maybe the guy went bezerk not because of id software, but because there was something terribly wrong. Though I know I am wrong. If the experts says Doom made him do it, then Doom it was."