Hello T. A. Gardner,
It's a claim. It relies on specific measuring of cherry picked indicators that in turn give the desired result. If you read the article Guno posted in post #3 in this thread carefully, that exact method was followed to get the results.
I read the article. I scoped out the source. I stand by my position.
Call it whatever you like. They are stating it as their best understanding of the situation. We have no reason to doubt it. There are always those who simply refuse to believe anything from government or the resources government uses to evaluate situations.
If you think it is cherry-picked, do you also believe that left wing extremist attacks have outnumbered right wing extremist attacks?
I think the article is based on nonpartisan information gathering:
"The Center for Strategic and International Studies (CSIS) is a think tank based in Washington, D.C., in the United States.[5] CSIS was founded as the "Center for Strategic and International Studies" of Georgetown University in 1962. The center conducts policy studies and strategic analyses of political, economic and security issues throughout the world, with a specific focus on issues concerning international relations, trade, technology, finance, energy and geostrategy.[6]
In the University of Pennsylvania's 2019 Global Go To Think Tanks Report, CSIS is ranked the number one think tank in the United States across all fields, the "Top Defense and National Security Think Tank" in the world, and the 4th best think tank in the world overall.[7][8] CSIS has been named the number one think tank for Defense and National Security for the past seven years, and has been declared the 'Center of Excellence'.[8]
Since its founding, CSIS "has been dedicated to finding ways to sustain American prominence and prosperity as a force for good in the world", according to its website.[9] CSIS is officially a bipartisan think tank with scholars that represent varying points of view across the political spectrum. The think tank is known for inviting well-known foreign policy and public service officials from the U.S. Congress and the executive branch, including those affiliated with either the Democratic or the Republican Party as well as foreign officials of varying political backgrounds. It has been labeled a "centrist" think tank by U.S. News & World Report.[10] "
Wiki
Now, if you would like to offer different data to support your claim that the information used to arrive at this conclusion is 'cherry-picked' please do so. I believe the information is accurate.