If you can challenge any of the things written in the Holy Quran, then you are right. But from the day it revealed, no body on earth could challenge it and this is the magic of Quran. If you have any doubt, please try to understand what is written in Quran(At least the 1st and 2nd Chapters). There are translations of Quran availble in almost all the languages. So please try to understand what actually Quran is and the true ISLAM. And also do not think that whatever all muslims do is Islam.
