I'd happily give up my firearms right this second if doing so would stop the madness of human-on-human violence I see.
Same here. Sadly, it would only cut it by a percentage, at best.
The US has mass shootings, yes. But those tragic mass shootings are a very small percentage of the overall number of deaths by firearm.
Most of the firearm related homicides come from inner city violence. The US has more heavily populated metropolitan areas, the areas where most gun violence takes place, than the other countries mentioned above.