It's not simple.
As I understand it, the District of Columbia has among the most strict gun laws in the USA - but the highest death by gun shot rate in the country. Montana has among the loosest gun laws, yet least problems. I'm not sure LAW is the problem, at least not the whole of it.
I don't own a gun (i've never even HELD a gun - at all, for any reason - in my life). On the other hand, two very close friends do own guns (in fact, one is a licensed concealed gun person - he has a gun hidden on his person most of the time). I not only in no way fear them, but I'd PRAY for one of the them to be around should some threat come..... And, if laws were so tough that these GOOD people could not have a gun, only BAD law breakers thus having guns, I would live in greater fear.
Life occasionally takes me to Mexico, which has among the most strict gun laws in the world, and where MANY are shoot to death in the streets every day.... I often fear in that country. I don't fear much in Montana...
I'm not in favor of anyone having any gun..... on the other hand, taking reasonable guns away from good, responsible persons IMO doesn't make the world safer. I wonder how many of those 45 cases were done by people who illegally owned a gun, the law in no way preventng what happened - only perhaps making it impossible to stop them until enough cops (WITH GUNS) showed up (several deaths later)?
