The write up below is typical of the religious mind.
"The religion of Islam was perfected and completed by Allah"
“Today I Have completed for you your religion and perfected my favor upon you and have chosen Islam as your Religion”(Quran: 5:3)
Who is this speaking. Muhammad or Allah?
The articles and dogmas of a religion are mind-made things and, if you cling to them and shut yourself up in a code of life made out for you, you do not know and cannot know the truth of the Spirit that lies beyond all codes and dogmas, wide and large and free. When you stop at a religious creed and tie yourself in it, taking it for the only truth in the world, you stop the advance and widening of your inner soul. But if you look at religion from another angle, it need not always be an obstacle to all men. If you regard it as one of the higher activities of humanity and if you can see in it the aspirations of man without ignoring the imperfection of all man-made things, it may well be a kind of help for you to approach the spiritual life. Taking it up in a serious and earnest spirit, you can try to find out what truth is there, what aspiration lies hidden in it, what divine inspiration has undergone transformation and deformation here by the human mind and a human organisation, and with an appropriate mental stand you can get religion even as it is to throw some light on your way and to lend some support to your spiritual endeavour.
In all religions we find invariably a certain number of people who possess a great emotional capacity and are full of a real and ardent aspiration, but have a very simple mind and do not feel the need of approaching the Divine through knowledge. For such natures religion has a use and it is even necessary for them; for, through external forms, like the ceremonies of the Church, it offers a kind of support and help to their inner spiritual aspiration. In every religion there are some who have evolved a high spiritual life. But it is not the religion that gave them their spirituality; it is they who have put their spirituality into the religion.
The creation of the religion by Muhammad was itself the original innovation.
The Pagans were carrying on happily. Muhammad complicated things for them.
This injunction defies reason:
It is not for a believing man or a believing woman, when Allah and His Messenger have decided a matter, that they should [thereafter] have any choice about their affair. And whoever disobeys Allah and His Messenger has certainly strayed into clear error. (Quran 33:36)
The seeds of division 'you' and 'they' were sown at the very beginning:
Narrated Ibn Abbas: When the Prophet arrived at Medina, the Jews were observing the fast on ‘Ashura’ (10th of Muharram) and they said, “This is the day when Moses became victorious over Pharaoh,” On that, the Prophet said to his companions, “You (Muslims) have more right to Celebrate Moses’ victory than they have, so observe the fast on this day.” (Bukhari)
The Allah of this religion is not a universal God. He divides humanity and yet claims to be creator of all.
This is the frailty of religion. Because religion is man made.
"Religion may be divine in its ultimate origin; in its actual nature it is not divine but human. In truth we should speak rather of religions than of religion; for the religions made by man are many. These different religions, even when they had not the same origin, have most of them been made in the same way.