[Charles Martel]

I remember a “Star Trek: The Next Generation” episode where commander Riker mentioned that World War III happened in the 21st century and killed 600 million people.

That was mentioned in the original series as well - and don't forget the Eugenics Wars are part to Trek canon as well. Khan was apparently a Sikh, so that's a hint as to what became of Muslim populations. You could build some seriously controversial "fan fiction" off of that, to the point where Paramount's lawyers start sending threatening letters. :-)

[Ozark Tom]

Sikhism is not Islam.