Terrorism has not destroyed countries across the past 2-3 decades.

Civil wars did. Many of them have either been started by, or fueled by American foreign policy.

So, yes, your country being destabilized by a civil war is a real threat if you live in the global south. In America? It's not going to happen because of a few mouthbreathers decided to cook some bathtub C4.

Globally speaking, USA imperialism is bigger threat than the terrorism with regards to the body count metric.

Yeah it has killed hundreds this month mostly again due to mismanagement of response to terror and management of the prep for terror. It's a significantly different thing to compare terrorism in 3rd world countries who are routinely targets of both non-State and State sponsored terror because lack of control mechanisms and terror in developed countries or countries with stable governance systems.