As for Osama's 'truce' I'm more intrigued that the tape seemed of such low quality and already some weeks old. Coming this way a 'truce' seems more like a sign of weakness.

The political effect of a threat by Saddam at this stage is a kneejerk reaction in favor of the current US administration.

Islam as a major religion is like Judaism and Christianity. They are pretty much different aspects of the same religion, give or take a messiah. Islam is by far the youngest of the major religions, by 600 years, and if you look at where Christianity was 600 years ago, you can spot them their lack of an "Englightenment" and be somewhat more understanding.

As with all religions, change comes over time, with changes in social structures brought on by technology, war and political processes.