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So when a Catholic doesn't know how to interpret scripture, they turn to the church... My understanding, is that in Islam there is no hierarchy really. Sure there are Imams, but there is no institution in Islam that settles disputes about the correct interpretation of the Koran, right?
It is interesting that you (and many or most Muslims and even Christians) seem to take the stance that it would be a good thing for some form of authority - as you call it, a hierarchy - to tell people how to interpret scripture.
I wonder how many of you realize how self-defeating such a stance is. That it may easily become a crutch is only the start of it.
So if there is a dispute among Muslims about how to follow the Koran, what Authority do you turn to?
That seems to be the question that haunts nearly all Muslims; they have been taught that it is very important to follow the Qur'an correctly, to the point of apparently believing that doing so is the literal cure for all illnesses.
Yet, innocent as that directive may seem at first glance, it is in fact quite the headache-maker.
Even leaving aside the matters of the actual merits and suitability of the Qur'an for its designed purpose (and those are quite formidable enough matters on their own), turning to an authority's call causes an inherent conflict with one's own judgement and understanding.
Worse still, it consists of giving up on the ability to reach mutual trust and understanding with other brothers of faith in exchange for the ability to say that some third party is right and therefore those who disagree with said third party are wrong. "Trusting" an Iman or Sheik is ultimately betting on his judgement to the detriment of one's own.
And, of course, such a situation all but ensures a lasting crystalization and exacerbation of any disagreements of doctrine. Muslims can hardly build bridges with each other when they have collectively renounced the ability or even the right to actually interpret and understand what are supposedly their own beliefs. Reducing themselves to "believers" of some school of interpretation or another denies them the ability to actually understand what they have learned.
Take for instance Hegel's model of dialectic, where an initial thesis is at some point perceived to be incomplete, imperfect or unconvincing, thereby originating an alternative proposition - an antithesis. Hegel realized that to find a solution, a true understanding of the matter at discussion, the tension between thesis and antithesis must be faced up front, made explicit, and resolved.
Muslims largely can't do that, because their belief system does not allow for true questioning. By taking the dogma that the Qur'an is perfect and definitive, they are reduced to betting that their chosen (or more often, inherited) authority figure is correct and those who disagree are just out of luck.
I know that you ask for that in the OP,
@PopeADope . But that just can't really work.