Husband doesn't want to get a gun

My husband and I used to be gun owners but he got rid of all our guns 5 years ago. There was an incident with it and he accidentally shot my step son when he was 14. He did not die. He was rushed to the hospital and was in critical condition. We were all really emotional and I let my husband do what he had to do to forgive himself which at the time was he didn't want guns in the house anymore. My step son is alive and well and he's fine. They've both been to therapy and everyone is okay. Recently we had our home broken into. Luckily we were not home but they stole from us. Then after that someone has been trying to break into our shed. I told my husband we should get a gun again but he said no. Lets just get surveillance cameras. I don't understand how cameras will help us if someone is tried to rob us. I just don't want us to get robbed again. I also think as the man of the house he should protect his family and should not be afraid to grab a gun and shoot a motherfucker who's endangering his family

Edit: How are we married? Let's see, met in college and fell in love haha. And if you're a responsible gun owner it would happen a second time. When that happened he had mishandled the gun. It was an accident and I guarantee wouldn't happen again because he knows how serious it is to handle a gun properly. If you handle a gun right it won't happen

Edit: To Emily I wasn't the one irresponsibility handling the gun the first time. He was.

Edit: To Emily again I called him STEP son because he is my step son. I'm his step mom. He has an active biological mother and I would never overstep in that way. Just because I call my step children my step children doesn't mean they are treated any differently than my biological children. They have all been treated the same. Have all been loved. Actually have a great relationship with all of them. Nice try though!