Morals are culturally defined behaviors. Running amok is a culturally defined behavior as was observed by travelers to the Pacific islands in the 1700and 1800s where killing or injuring dozens with a weapon, typically a kris, was a frequent occurrence. 
The US is not in the very top of homicides or suicides which in in line with the interesting inverse correlation between suicides and homicides. There is data (not just speculation) about educational ways to reduce both and modify cultural expectations. Shifting cultural attitudes is a slow process and individuals may not always respond since their environment goes beyond the school with peer acceptance being a very important factor. Unfortunately, representatives feel more comfortable with their old talking points than they do applying data to a problem that is not quickly resolved.