Much of my childhood I also shared house with an actual (full auto, large caliber) assault rifle, but my dad was always very careful to point out that war was not cool.
In fact, from my childhood, the gun owning part of the family were simultaneously the mild mannered, book reading part of the family.
My Swiss friend in town told me as far as he knew Switzerland still people keep fully functional assault rifles at home but those who have them need to show up for three weeks of training each year and show up at a shooting range twice a year. (He left a few years ago so anyone actually living there now should feel free to correct this.)
My conclusion has always been that the gun violence problems in US is largely a culture problem.