Bowling For Columbine

When I watched Bowling For Columbine I thought that America is very violent. I do not understand why the U.S has over 11 000 gun related deaths every year and Canada has less than 100. When we saw the surveillance video of the high school students in the cafeteria at Columbine shooting everyone, i was shocked. I don't understand why or how anyone would be motivated to go into their school with guns and fire over 900 rounds wounding many people and killing a few, including themselves, especially since they were only weeks away from graduating an would never have to talk to their classmates again. Even if they absolutely couldn't wait a couple weeks to get out of school, the could have at least just killed themselves and not the innocent people at Columbine. I am interested to find out what motivated them to do it. After watching the film, I would like to find out why America is so much more violent than Canada, why so many children are motivated to kill themselves and other innocent people.