first of all, I am Muslim, that is precisely why I give 8/10. the dick head above is so ignorant of their own religion, and now try to to teach other, what a joke. of course Muslim, Jew and Christan have connection with each other. Just to put it simple, just go to nearby university, meet someone who do theology course and ask question about this three religions, and you will get a competent answer, trust me. it's that simple. God of Sin, God of moon, common men!!!, this is ridiculously stupidest thing I ever heard. Yeah long2 time ago Christan in dark age didn't know much about Islam. so they just consider Islam was Pagan religion, when both civilization clash, then they know about Islam and start learning all sort of thing, science, philosophy, history, medicine, etc. Don't write here like u know everything, try reading some accomplish book(from professor etc). why Muslim take crescent as their symbol, its simple. in Islam we have our own calendar. we didn't used sun as our parameter but instead of that we use moon. that is why.