I think posting the excerpt you choose after reading the link you provided is rather disingenuous. Your source itself criticizes the way the data is presented and provides alternative ways to display the data.
Of course the problem is not uniquely US-American, but I believe the way the US deals with this problem largely is.
Average (Mean) Annual Death Rate per Million People from Mass Public Shootings (U.S., Canada, and Europe, 2009-2015):
Norway — 1.888
Serbia — 0.381
France — 0.347
Macedonia — 0.337
Albania — 0.206
Slovakia — 0.185
Switzerland — 0.142
Finland — 0.132
Belgium — 0.128
Czech Republic — 0.123
United States — 0.089
https://worldpopulationreview.com/country-rankings/mass-shoo...