Hi. A very interesting post (haven't checked the video yet).

I'd like to add my thoughts on your question:
"Then I started to wonder has this always been happening and we are just becoming more aware of it, or is there something wrong with our culture that promotes violence in general?"

I believe that according to 'cause and effect' relation, violence is rising. But that is generally an effect of mainstream media acting as social reality creators. Check the news and just notice what kind of news is being brought to public, again and again. We are being more aware of it because they are creating the social reality by selecting and serving specific types of news. Violence, corruption, poverty,... The mainstream media is promoting all this.

Stop watching TV and start helping the young. They are our only hope, after all. And you'll also be able to stay positive by seeing the effects of your efforts, energy, deeds.

It's an awesome experience, to plant a small seed of good - a tiny tree or a positive thought and watch it grow... ;)