I was also gifted firearms as a child. They were kept inside a locked safe that I didn’t have the combination for when not being used for hunting or target shooting. As much as I enjoy guns, hunting, and shooting, I can also see that responsibility goes beyond “it’s guaranteed in the constitution” or equivalent bullshit.
I think you’re correct. We were taught about manifest destiny but not the genocide of Native Americans, and that’s just one instance of the institutionalized racism we were taught was good. SO MANY PEOPLE never grew out of that or tried to be better.