That's no surprise, since the Qur'an contradicts itself, though the contradiction is carefully disguised in an apparent mess of aleatory disorganisation.
Oh, you do that already.
What does Islam rest upon? The assertion that there is one deity, which, in the context of the poisonous trinitarian heresy, is contradiction of Christianity- apparently- while actually promoting the notion that trinitarianism is Christian. The assertion that Muhammad is the man to listen to, without any evidence for same. Simple bigotry.
Then there are three legalisms miscopied from the Bible and fake Judaism- prayer, charity and fasting. The prayer is formal, in serried ranks under supervision to extinguish individuality and retain control. That charity is enforced betrays the absence of personal desire. In other faiths, charity is voluntary. The fasting is likewise, though it's hardly fasting when it does not last even one whole day.
These three legalisms give an illusion of merit, but fit well with this prophecy:
'People will be lovers of themselves, lovers of money, boastful, proud, abusive, disobedient to their parents, ungrateful, unholy, without love, unforgiving, slanderous, without self-control, brutal, not lovers of the good, treacherous, rash, conceited, lovers of pleasure rather than lovers of God having a form of godliness but denying its power.' 2 Ti 3:2-5 NIV
Then there is pilgrimage, to reinforce the worship (for that is what it is, like the Mariolatry of RCism) of Muhammad, the prophesied antichrist.
'"Many false prophets will appear and fool many people."' Mt 24:11 GNB