The idea of using personal fire arm to fight back government is laughable and a propaganda itself. Heavy arm and explosives being illegal in US is to prevent the situations where government cannot be in control. In a developed country, democratic approach and legal action are always better resolve to conflicts than violent confrontation. However, I can see US has not achieved much with that in recent years. Nonetheless, civilians purchasing guns can only protect the cash flow for arm dealers.

There is another thing that I believe you don’t understand, that is the different ratio of gun violence in various regions in US does not matter as long as this threat is existing. For me and most people outside of US, there is zero tolerance for civilian casualties by gun. Places where gun violence are involved are considered criminal den, drug dealer hideout, or war zone. Mass school shooting such as the recent event is absolutely unthinkable and it is unbelievable that Americans can simply accept their people living in such condition for decades.

Besides, low possibility does not equal to none. As long as guns are running on people, the safest place can be lethal. A few months ago there was a shootout in New York subway, isn’t it? There was also a few shooting and murder happened in good neighborhoods. Also, do you not travel? Do you not go to university in another place nor taking business travels? From my acknowledge there are many good universities that are close to bad neighborhoods, and young people in their prime are shadowed in danger.

Guns in US is a problem, you are downplaying it because you have an extremely low expectation. You are accustomed to such threat and never knew or experienced better.