What can a terrorist / gang organization offer me that I'm not getting from everyday life?
Terrorists and gangsters are people too. They are not necessarily stupid nor hotheaded. There must be something deeply attractive / satisfying about being involved in acts of extremism. The obvious are rewards in the hereafter. But, as, I'd argue, an instant gratification type, there must be something in the here and now that attracts these people. What is it? And is there a less terrifying alternative for them in mainstream society?