I think it has always been part of human history that people like violence.
People were watching slaves get torn apart in roman times, for entertainment. I agree that these things tend to de-sensitize our kids to violence...but even if video games weren't so popular, they'd still like violence.
I think it needs to be accepted that violence is a part of being human. We strive to be better than that, but violence is in all of us, and it's useful if we need to defend ourselves...and I do agree that they are being overly bombarded with violence these days, and it does have an effect. I'm just saying, that people have always been violent.