I already gave you data, but attached is more that shows the U.S. far above other countries in

Europe, East Asia, Australia and Canada in Gun Deaths per 100,000 total population. Note that the last two countries recently banned Assault Weapons and saw gun deaths drop markedly...especially from Mass Killings...all without internal strife...i.e. no big deal.

As for your claim of gun ownership rights...without appropriate responsibilities...Google Justice Warren Berger's thoughts on the 2nd Amendment.

https://en.wikipedia.org/wiki/List_of_countries_by_firearm-related_homicide_rates