In Qu'ran they recognize the divinity of Jesus Christ and endorse his new covenant, as well as call out jewish hypocrisy so idk, as far as muslims go, they were already practicing christians...all the extra rules are because they forgot they were the children of Ishmael and they simply practice dietary restrictions etc as an acknowledgement of their own renewed covenant with GOD/Adonai (cant use the lord's name in vain, people do it this way because the reader may not be in a state of reverance at the time)