A "profession of belief" in the Quoran (or the Bible, or any other given scripture) is manifestly (as a fact of history) compatible with a multitude of religious/cultural systems, slants and attitudes. None of these books contain any injunction that is immune from transformation and redirection by the interpretation of the individual believer or by the community of belief. The assumption that any scripture (sufficiently rich to support a durable religious tradition) woodenly dictates the characteristics and character of the religion attached to it is ahistorical and counterfactual (and stupid).