Watch this 7 minute video (below) titled: MUSLIM DEMOGRAPHICS: THE TIDAL WAVE
Then watch these two very cool maps that quickly change showing the development of religion over the last 5000 years of history:
History of Religion
The geography of faith and its wars across history
See 5000 years of religion in 90 seconds:
Imperial History of the Middle East
Who has conquered the Mideast over the course of world events?
See 5000 years of history in 90 seconds: