Red flag laws may have helped there. Recently fired, disgruntled shooter. If he had threatened anyone, he would be game. Can’t catch them all, but those who give hints need to be looked at.
There is no 2nd Amendment right for those who threaten others in any way and/or have history of violent behavior.
I don’t believe there is an individual right to possess guns, but while others have them, we should have laws and rules on that possession. Have your AR15, if you are not crazy, and not a felon.