Guns aren't the problem. Rage is the problem.

People have had guns since the 17th Century. Lots of Americans have guns they will never use or use only for target practice. In the UK, where guns are hard to get, knifings are dreadfully on the rise.

An enraged man who can't get a gun uses a bomb, commits arson, or drives a car into the crowd.

These are some things I believe are behind the rage:

the breakdown of the family.
attendant child abuse and neglect, which produces people who cannot
think well and have not learned to care about other people.
alcohol and illegal drugs.
hours and hours of violence in TV, movies, computer games.
lack of mental-health care
right-wing rhetoric stirring up fear and racism.
websites where manipulators groom the vulnerable to kill.

The shooter in Parkland Florida was so stupid that he could not operate a microwaves or clothes dryer. Yet somehow he got hold of sophisticated weapons and ammo and knew how to load them. He was wily enough to enter the school against traffic when students were leaving at the end of the day.

Somebody taught him to do that, probably somebody on the Internet. It's time to start exposing these people.