This would be inconsequential except for two very important things:
- It was written down.
- Islam's most revered book (the Koran) says no less than 91 times that Muhammad is the ideal example of conduct for Muslims.
This presents an ideological barrier to the global (or even local) coexistence we seek. The first step in overcoming this obstacle is certainly acknowledging its simple presence. If Islam was a dying religion, maybe we could just ignore it and let it fade away, but it is the fastest growing religion in the world, and the percentage of Muslims who are moving from casual believers to fundamentalists is also growing. It's something we'd better face. And soon.