Very much agree on that.
To break it down: you are saying only dumbasses are asinine enough to think terrorism is a worthwhile pastime. Hope this sums it up.
I don’t fully agree on your assessment, since even intelligent people can feel disenfranchised.
Broadly speaking, intelligent and even educated people can live in circumstances which make them prone to indoctrination. And these circumstances don’t even have to be completely life-threatening or unbearable.
However, I would agree that the best thing against terrorism is a broad, diverse and qualitative education, based on humanistic principles.
It’s much, much harder to brain-wash those can question themselves, and others. Critical thinking is important.
