Will the U.S ever get control of all these mass shootings?

One side blames it all on the gun culture the states have, another blames mental health.
One argument is what is the point of a firearm law, the shooter already broke the law, so what good is another law?
Another makes a case for mental health, but would these shooters actually seek mental health care if it was available to them?
What is causing these people to shoot innocent strangers?
What do you think could be done, that is more than a knee jerk reaction?