A terrorist group may be a small or a large group of members who share the same cause, ideology, or religious belief. They may be an international group or a domestic group. Their campaigns may be sponsored via self preservation (autonomy) or via state sponsorship (semi-autonomy). Members of such a group may be male or female and with varied ages. A terrorist group can be a socially acceptable infrastructure for people of the same mindset, and most importantly a terrorist group provides social recognition and reinforcement for its members (White, 2006). Such a group may provide a heaven for social misfits and/or people of high social class. There is no set criterion for who is qualified to be a terrorist based on their economic and social status.
Reference
White, J.R. (2006). Terrorism and Homeland Security. (5th Ed.). Belmont, CA: Thomson-Wadsworth.