If it accords with the Quran it is unnecessary and can be burned. If it doesn't accord with the Quran it is heresy and must be burned.

An interesting brouhaha results from Pope Benedict XVI's alleged comments on Islam and the possibility of reinterpreting the Quran. From a Daniel Pipes article in the New York Sun:

Father Joseph D. Fessio, SJ, recounted on the Hugh Hewitt Show the details of a seminar he attended with the pope in September 2005 on Islam. Participants heard about the ideas of a Pakistani-born liberal theologian, Fazlur Rahman (1919-88), who held that if Muslims thoroughly reinterpret the Koran, Islam can modernize. He urged a focus on the principles behind Koranic legislation such as jihad, cutting off thieves' hands, or permitting polygyny, in order to modify these customs to fit today's needs. When Muslims do this, he concluded, they can prosper and live harmoniously with non-Muslims.

Pope Benedict reacted strongly to this argument. He has been leading such annual seminars since 1977 but always lets others speak first, waiting until the end to comment. But hearing about Fazlur Rahman's analysis, Father Fessio recalled with surprise, the pope could not contain himself:

This is the first time I recall where he made an immediate statement. And I'm still struck by it, how powerful it was….the Holy Father, in his beautiful calm but clear way, said well, there's a fundamental problem with that [analysis] because, he said, in the Islamic tradition, God has given His word to Muhammad, but it's an eternal word. It's not Muhammad's word. It's there for eternity the way it is. There's no possibility of adapting it or interpreting it.

This basic difference, Pope Benedict continued, makes Islam unlike Christianity and Judaism. In the latter two religions, "God has worked through His creatures. And so, it is not just the word of God, it's the word of Isaiah, not just the word of God, but the word of Mark. He's used His human creatures, and inspired them to speak His word to the world." Jews and Christians "can take what's good" in their traditions and mold it. There is, in other words, "an inner logic to the Christian Bible, which permits it and requires it to be adapted and applied to new situations."

Whereas the Bible is, for Benedict, the "word of God that comes through a human community," he understands the Koran as "something dropped out of Heaven, which cannot be adapted or applied."

There's some controversy about how accurately Ben Seize is being quoted here. Fessio is a bigmouth who strikes come-hither poses with farm animals. A key participant in the seminar indicates there's more of Fessio than the pope in the above description. In any event, Pipes, in a rare optimistic turn, disagrees with the view attributed to the pope:

The Koran indeed can be interpreted. Indeed, Muslims interpret the Koran no less than Jews and Christians interpret the Bible, and those interpretations have changed no less over time. The Koran, like the Bible, has a history.

For one indication of this, note the original thinking of the Sudanese theologian Mahmud Muhammad Taha (1909-85). Taha built his interpretation on the conventional division of the Koran into two. The initial verses came down when Muhammad was a powerless prophet living in Mecca, and tend to be cosmological. Later verses came down when Muhammad was the ruler of Medina, and include many specific rulings. These commands eventually served as the basis for the Shari'a, or Islamic law.

Taha argued that specific Koranic rulings applied only to Medina, not to other times and places. He hoped modern-day Muslims would set these aside and live by the general principles delivered at Mecca. Were Taha's ideas accepted, most of the Shari'a would disappear, including outdated provisions concerning warfare, theft, and women. Muslims could then more readily modernize.

Whole article here. The user comments are worth reading: In addition to many expected disagreements from bible thumpers and thumpers of assorted other holy books, one commenter notes that Mahmud Muhammad Taha's efforts were rewarded with an execution by public hanging, for the crime of apostasy. I have my own thoughts, but let's just open the floor…