Check this out. I can't argue it any better than this.
I'll not be responding in the thread to this particular issue anymore.
http://focusonjerusalem.com/islamandchristianity.html
I will check it out, but this is my specific focus in school... I have read numerous things on the subject. I'm certainly not trying to make arguments for the enemy, I do believe the only way we can defeat them is to truly understand their motives.