I like the idea of christianity not adopting the divinity of Jesus and Mohamed being the censor for a teaching twisted by humans.
We have to note, though, that such a religion would be open to further prophets lateron. We had Jews, which God taught by sending prophets. Then he sent Jesus, which led to the church. Then he sent Mohammed, to corrects things that went wrong. Such a religion should be open repeatedly to new sects founded by new prophets. Just to give an example: Luther could proclaim himself a new prophet as well or could be regarded as one. Quite likely this will end in much more "christian" denominations than OTL.
All religions are open to new prophets. Islam has been challenged by new prophets on many occasions and now we have the Ahmadis and the Bahais to name but two.
You cannot make a religion 'prophet proof'.