That is really the biggest thing, which people seem to forget. The Middle East is extremely politically unstable right now, and it's political instability that breeds radicalism, not any particular religion
I agree that this bears a large portion of the blame but not nearly all of it. If the region were dominated by Christianity I believe we'd see vastly different results. Mainly, bc there's no verse telling you to murder non believers (or the more derogatory term, infidel). Not to mention, we're finding now that many Muslims that grew up in developed countries are orchestrating these attacks as well
You're funny. Try cracking open a european history book. It's literally christian vs christian wars and christian instigated wars on muslims for centuries.