I have relatives that think it is a bad idea to carry.
I have a (step) sister in particular that doesn't even want a gun in her house. I sent her the links to several news stories on crime in the Dallas area. She replied that they don't live in Dallas or go to it and that their suburb is nice, and those types of things don't happen there.
Some people choose not to see the danger around them; it's uncomfortable to think that there is cruelty in the world. They're hoping that if they don't think about it, it might just miss them.
I don't think there's anything you can do to change their minds. I think you know that, but you probably hate how they talk to you. I'm sure it grates on you.
I hope the posts here are encouraging you, and I'm glad your wife is supportive as well.