I always thought this was obvious.
Of course the Muslims always worm around the obvious by saying the Christians and the Jews corrupted Allahs message and the Koran is the perfect message given by the Archangel Gabriel to the Prophet Mohammad.
But some how I think I believe more in a god that sends a message of love rather than a message of hate.
Ill take the Bible over the Koran any day.
The koran was written back to front; peaceful to violent; => as Mohammed assembled power as a warlord!!!
Mohammed couldn’t risk offending adjacent tribes, leaders, etc...until he had a state and a standing army.
The Muslim calender begins when Mohammad obtained leadership, stately and that of an army.
The christian calender begins with the birth of Jesus. The Muslim calender celebrates Mohammads reign of tyranny.
This is a good series, sorry it’s long with 12 parts:
http://www.youtube.com/watch?v=s7m3r4Wla3s&feature=related