First, let's let the FBI and various agencies do their job before we start speculating about all of this. One thing is clear, this could happen anywhere at anytime.
Guns are an issue but more importantly extremism is the problem. When you combine extremism and anger, violence erupts.
I own many guns. I do do legally. I also make sure to train with them and become proficient. I train with a guy who runs a school and is an ex SEAL. With any tool, understanding it comes down to training with it.
The guns and violence issue is such a broader issue than ban all guns. It has many elements that need to be addressed. Not 1 solution will fix this. It will take many different things on many different fronts.
Banning won't work. Prohibition didn't stop alcohol, only made it worse.
I live in south Florida. If a major category 5 comes through and causes major damage and problems with resources and recovery, looting and violence would follow. The police would not have the resources to stop it all. I would want to be prepared to protect my family and my home.