There are actually differences between direct and indirect forms of violence. A society would be much more unstable if direct forms of violence was encouraged. Think of the term out of sight out of mind. If a part of the society was encouraged to be violent it would lead to destabilizing effects in the future.

Although violence might be an answer. It should never be encouraged. Same with suicide. Its a personal choice which reflect more on the failure of society than on the actual individual. Often times we only look at the individual when someone does wrong, we never question the people they grew up with, or interacted with on a daily bases. And we almost never question ourselves.