I will document my personal journey that will end in her acceptance of concealed carry or our divorce
First, define acceptance. Sounds like you already applied for the permit, bought the gun, and are carrying it. She is still living in your house. Sounds like she has already accepted it on one level.
So give her some credit for that.
Second, it's her house too, and she ought to have some input. If she doesn't want to have guns in her house, she should have the right to not have guns in her house. It sounds like she has already realized that she actually shares her house and has therefore given up some right to totally dictate terms. Seems you ought to do the same. What can you give? It seems like you already have what you want, except for the ability to do so without dealing with disparaging remarks.
You've just announced to the entire internet that you plan on being absolutely inflexible. I think you ought to rethink that position.
This should be about guns and acceptance of guns. By taking what you want and then demanding that she become ok with it or you leave (or throw her out?), you turn it into a power struggle.
I think she needs to spend time around guns. Not necessarily handguns, probably not tiny carry pieces, but just guns, and gun people. I think the absolute worst person to introduce her to guns at this point is you. Married couples often can't teach each other well in general, and when the thing being taught is a point of contention it is unlikely to end well.
She might be best off meeting with some women gun owners. Not even necessarily at a range or for shooting, but just to talk about guns and shootig and shooting sports and self-defense. Or maybe guns not but necessarily your point of interest, shotgunning, or rifle shooting.
If you're any where near me, I'd love to take her out and her a few things in a non-judgemental, non-pushy way.