I believe the problem is being misidentified. We should first consider how such forces come to power in the first place. This issue is not primarily about belief systems. Instead, it stems from social inequality, political instability, and a lack of education, all of which create a fertile ground for extremism. Additionally, we must acknowledge the role of economic elites who, in pursuit of their own interests, often manipulate public sentiment by stirring up fears and creating enemy images.
Discussion
I disagree with you. All the things you mention are surely factor but in my belief, belief systems are the central factor in play here.
Hmmm.
US belief system has cost the lives of several million people since World War II.
These sources provide comprehensive analyses and estimates of the human costs of the conflicts in which the US has been involved:
Costs of War Project: Brown University
https://watson.brown.edu/costsofwar/
Iraq Body Count: Iraq Body Count
https://www.iraqbodycount.org/
Lancet Study on Iraq: The Lancet
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(06)69491-9/abstract