According to the US government we do:
The sociology and psychology of terrorism: Who becomes a terrorist and why?
September 1999
Author: Rex A. Hudson
Editor: Marilyn Majeska
Project Managers: Andrea M. Savada
Helen C. Metz
Federal Research Division
Library of Congress
Washington, D.C. 20540–4840
Tel: 202–707–3900
Fax: 202–707–3920
E-Mail: frds@loc.gov
Homepage:
http://www.loc.gov/rr/frd/Environments conducive to the rise of terrorism include international and national environments, as well as subnational ones such as universities, where many terrorists first become familiar with Marxist-Leninist ideology or other revolutionary ideas and get involved with radical groups. Russell and Miller identify universities as the major recruiting ground for terrorists...
Moreover, in Guttman's analysis, the terrorist requires a liberal rather than a right-wing audience for success. Liberals make the terrorist respectable by accepting the ideology that the terrorist alleges informs his or her acts. The terrorist also requires liberal control of the media for the transmission of his or her ideology...(page 26 of the PDF file)
more:
GENERAL HYPOTHESES OF TERRORISM
If one accepts the proposition that political terrorists are made, not born, then the
question is what makes a terrorist. Although the scholarly literature on the
psychology of terrorism is lacking in full-scale, quantitative studies from which to
ascertain trends and develop general theories of terrorism, it does appear to focus
on several theories. One, the Olson hypothesis, suggests that participants in
revolutionary violence predicate their behavior on a rational cost-benefit calculus
and the conclusion that violence is the best available course of action given the
social conditions. The notion that a group rationally chooses a terrorism strategy
is questionable, however. Indeed, a group’s decision to resort to terrorism is often
divisive, sometimes resulting in factionalization of the group.
http://www.au.af.mil/au/awc/awcgate/loc/soc_psych_of_terrorism.pdfAn interesting read culled from google.com/unclesam while looking for info on terrorism and psychology. Still reading the whole thing (186 pages).