if you want

to stop violence and gun crimes, then cut it off at its source instead of needless bickering about gun laws.

Stop producing and showing violent television shows, movies, video games, etc. THAT is where people get the ideas they get. Stop with 24, with Jack Bauer using extreme torture methods to get what he wants. No more vigilantes taking the law into their own hands and killing dozens of people because the government won't do it for them. No more violence. THEN people will stop having violent impulses, and there will be less killing.

Mama always told me that "you are what you eat". The same is true in this case. If you spend your time consuming violent media, it's what fills your mind. It affects you. Negatively.

Face it: violent media spawns violent crimes in the real world.