But you cannot deny that islam has played a major role in influencing that sort of tribal, archaic mentality though. It is literally integrated into their laws, their way of life, and the way they view other people (women, gays e.t.c) This fundementalism is what's keeping their respective societies stuck in the dark ages, something that is not rlly the case anywhere else, as far as I'm aware.
Arab culture preceded Islam.
I would argue the opposite, that Arab culture is what stopped Islam from going through a reformation akin to Christianity and Judaism (to a lesser extent). True that Islam compered to other religions is much more a pollical system in nature and therefore easier for rules to exploit in keeping civil progress/rights at bay. It's just easier to control people under the pretext of obeying God then do it by explicit force. It's just a perfect storm.
Again I'm not an advocate of Islam, I agree it's archaic and long, long overdue of modernizing. Maybe the current Shia-Sunny divide will end like the Christian reformation. from then onwards the Christian world became much more tolerant, internally and eventually to other religions.
To my point, force-forming of countries, especially post WW2, regardless of facts on the ground is what leads to this internal conflicts and collapses. The only remedies this countries have is to resort to totalitarian regimes to have any chance of keeping a façade of an independent country.
Look at African countries as evidence, same made up countries, same internal conflicts, same views on gay rights etc. Islam had nothing to do with it.