thats the whole point, God did not send the QUran alone otherwise it was not above him to have the Quran miraculiously appear in Kabba ( which was the holy house of pagan arabs) Quran needed to be uttered through the tongue of an unlettered arab i.e Muhammad and reinflorced through his example
You did not answer my question. Where do you think these sects got their way of praying from? And why should this be the only way to pray?
Why don't we hear any Christians asking how do we pray? How do Christians pray?
3.113-115. Not all of them are alike: Of the People of the Book are a portion that stand (For the right): They rehearse the Signs of Allah all night long, and they prostrate themselves in adoration. They believe in Allah and the Last Day; they enjoin what is right, and forbid what is wrong; and they hasten (in emulation) in (all) good works: They are in the ranks of the righteous. Of the good that they do, nothing will be rejected of them; for Allah knoweth well those that do right
How do these people prostrate? Do they do it like the Muslim sects do?
22.34 To every people did We appoint rites (of sacrifice), that they might celebrate the name of Allah over the sustenance He gave them from animals (fit for food). But your Allah is One Allah. submit then your wills to Him (in Islam): and give thou the good news to those who humble themselves,-
22.18 Seest thou not that to Allah bow down in worship all things that are in the heavens and on earth,- the sun, the moon, the stars; the hills, the trees, the animals; and a great number among mankind? But a great number are (also) such as are fit for Punishment: and such as Allah shall disgrace,- None can raise to honour: for Allah carries out all that He wills.
22.26 Behold! We gave the site, to Abraham, of the (Sacred) House, (saying): "Associate not anything (in worship) with Me; and sanctify My House for those who compass it round, or stand up, or bow, or prostrate themselves (therein in prayer).
22.37 It is not their meat nor their blood, that reaches Allah. it is your piety that reaches Him: He has thus made them subject to you, that ye may glorify Allah for His Guidance to you and proclaim the good news to all who do right.
22.40 (They are) those who have been expelled from their homes in defiance of right,- (for no cause) except that they say, "our Lord is Allah.. Did not Allah check one set of people by means of another, there would surely have been pulled down monasteries, churches, synagogues, and mosques, in which the name of Allah is commemorated in abundant measure. Allah will certainly aid those who aid his (cause);- for verily Allah is full of Strength, Exalted in Might, (able to enforce His Will).
Don't limit God! He is everyone's God and not just the sects. This is the problem with sectarianism, each has become an exclusive tribe. God is for everyone.