Reducing the war on terrorism to a contest of 2 main extremists pitted against each other isn't accurate. Although I think there are some decisions Bush makes that rely a bit too much on his religion, I certainly wouldn't label him comparable to OBL. OBL I think is using Islam as an excuse anyways. I don't think it's so much religion with him as it is a serious bone to pick, and religion is his in-road to controlling people.

I do agree with Flaggot that conflicts based on religion will be very hard to erase from humanity. Religion is very often used as an excuse to go kill someone or take back land. I don't really believe that's the case with Iraq or Afghanistan.