Gun control to a reasonable extent is certainly a good idea, but it won't solve the problem. I know lots of people who own guns. It's quite common in my bfs home country. Yet there's pretty much never news of shootings. You know why? People have healthcare and some social safety nets. They don't tend to get as bad as this woman got. If she didn't have a gun, god would've told her to stab people at the supermarket because the system has gravely failed her in some way. Mentally healthy people aren't told by god to kill people. So while gun control is necessary, it's very far from the solution to the violence problem in the US.