it's not as if most people have considered the KJV of the Bible as the only useable version, and versions which have references to an asexual god are being used. Given this, I see no reason not to bar, by law, the use of socially destructive and discriminatory passages from the Quran and other Islamic texts for 'religious' purposes, since they are arguably already in violation of the laws relating to literature which advocates violence and insurrection.
It's the lack of exigesis, or evolution, of Islam that makes these passages you speak of so dangerous. For centuries, Islamic scholars who sought to bring the religion into the modern era, by putting the Koran into an historical context -- and thus debunk its absolute orthodoxy -- have been persecuted and banished from Islamic society, since they were a threat to the abolute power of the Mullahs. Rather than editing the Koran, it needs scholarly and open interpretation for what it is: the work of "holy" men over a period of time, and not something to be taken verbatim as written by the hand of God, and thus not open to interpretation by mere mortals.
The same slavish devotion applies to the Sharia, or teachings, that accompany the Koran, and not least to the Mullahs who perpetuate this "surrender" of the mind to a totalitarian religion by teaching followers that they can make no moral or religious decision, however insignificant, on their own.