The argument lies in the question of how integrated are ideologies of terror and Islam? This then unravels the assimilation vs multiculturalism debate as well as interventionist vs preservationist approach.
Personally, I believe Abrahamic religion as a whole is an outdated concept and does not fit with a world that is globalizing and becoming multicultural (both concepts that are economically necessary imo). However, I believe in freedom more and people should be allowed to use a value system to guide their thought if they so choose.