Mughal

Why Christianity changed with time and islam did not?

I would think because christianity basis itself directly into jewish traditions. Since jewish traditions evolved over a period of time which is obvious from the books of the holy bible hence the notion of change is more acceptable to jews and christians or for that matter hindus etc etc. The problem with islam is the belief that it popped out of nowhere ie suddenly dropped of the heavens. Islam disconnected itself both from jews and chrisitians despite the fact that it accepts them both as people of the book in concept.

By rejecting jewish and christian scriptures and traditions as forgeries etc islam has disconnected itself from the evolutionary process. This makes islam static and therefore reason for stagnation that is present in muslim societies world wide.

MBS

My understanding was that the Quran doesn't reject the Judeo-Christian scriptures outright. It just picks and chooses what parts are valid and what parts were supposedly corrupted by "the people of the book." Christians didn't accept all the Jewish scripture either though.

I see what you are saying about the Jewish/Christian traditions and scriptures being more open to change. The Bible was not written by a single person at a single time, so the message is more varied. It also has a lot of contradictory messages. It basically requires reinterpretation or you can't get much out of it. The Quran comes across more as a bunch of commands, it tells you to do this and that to be a good muslim. Not much interpretation there. Individual books of the Bible, such Laviticas, are somewhat like the Quran, but the bible as a whole is much more varied.