If the gun is treated like the hazard it is, I doubt it’d be the sole reason for such behaviour. Maybe he is just using it as an excuse when there are other issues he is not bringing up? But yeah, I can’t possibly know all the intricacies of your family relationships and playing a remote family therapist is not the best thing to do. I hope you can find some common ground one day.

And sorry for throwing you into a “stereotypical American” bucket like that, it’s a bit too easy to find such people nowadays.