From the statistics I found the top 10 countries in the world with the highest Murder rate share something with the top 10 countries in the world with the lowest Murder rate - private citizens are legally prohibited from owning firearms. I can't tell, but the U.S. may actually be #4 on the list for top 10 countries with the highest Murder rate, but it could just be the Virgin Islands.
In 2020 over 8,000 Murders in the U.S. were committed with a handgun. 455 with a rifle (this includes "Assault Weapons"). 662 with hands/fists/feet.
https://worldpopulationreview.com/country-rankings/murder-rate-by-country
https://www.statista.com/statistics/195325/murder-victims-in-the-us-by-weapon-used/
There is something going on in the U.S. and it has more than just easy access to firearms. Mass Murder incidents have been going on in the U.S. and other countries for over a century. Something has happened in the past 20 years or so that caused the frequency of them.
It is a multifaceted issue. What is sad is when events like this happen there seems to be a popular reaction to look to government as if the government were a god and demand to know why the incident was not prevented. It is as if the almighty government had the duty and the power to grant eternal life to all being.
Then there is always a demand for new legislation. The U.S. is over legislated.
In the U.S. there are criminal laws that determine who can purchase, own, or possess a firearm and who can't.
- Possession of a firearm by a felon is a criminal offense punishable by imprisonment.
- Selling a firearm to someone mentally ill is a criminal offense punishable by imprisonment.
- Leaving a firearm where a minor can gain access to it is a criminal offense punishable by imprisonment.
- Assisting a person prohibited by law in purchasing a firearm is a criminal offense punishable by imprisonment.
- Bringing a firearm onto school property is a criminal offense punishable by imprisonment.
- Possession of ammunition by a person prohibited from possessing a firearm is a criminal offense punishable by imprisonment.
- Unlawfully discharging a firearm at a building inhabited by persons is a criminal offense punishable by imprisonment.
- Unlawfully displaying a firearm is a criminal offense punishable by imprisonment.
- Using a firearm in the commission of a crime is a criminal offense punishable by imprisonment.
- Unlawfully committing Murder is criminal offense often punishable by life imprisonment without the possibility of parole or state sanctioned execution.