an excerpt from that article helps point out the skewed analysis...
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"Thanks to the smaller populations of most European countries, individual events in those countries had statistically oversized influence and warped the results. For example, Norway’s world-leading annual rate was due to a single devastating 2011 event, in which far-right extremist Anders Behring Breivik gunned down 69 people at a summer camp on the island of Utøya. Norway had zero mass shootings in 2009, 2010, 2012, 2013, 2014, and 2015."
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Meanwhile, here in the U.S. we've had as many mass shootings this year as there have been days...why do you strive to trivialize this problem?...what is wrong with you?
Link: https://worldpopulationreview.com/country-rankings/mass-shootings-by-country