Its all relative wrote:
Not necessarily a bigger problem in the US if you take the size of the territory into consideration. Most other countries like Serbia, France etc are much smaller in area compared to the US. The bigger the country the more often it will happen. What is the rate per capita would be a better figure for comparison and
Countries with the Most School Shootings (Incidents per million Jan 2009-May 2018):
United States — 0.87
South Africa — 0.1
Afghanistan — 0.075
Mexico — 0.063
Nigeria — 0.019
Pakistan - 0.017
Serbia, with one incident for 6 million people would be 0.17
So the US beat the closest competitors (South Africa, Afghanistan and Mexico) by 10/1.
You are welcome.