Are you saying that OT ceremonial laws apply to Christians? If not, what conflicting doctrine does mainstream Christianity introduce?
Apostolic Christianity is the mainstream of Christianity, both historically and numerically.
Between Eastern Orthodoxy and Catholicism, Apostolic Christians represent 1.4 billion of the world’s 2 billion Christians.
I'm not saying anything that is of me. My Messiah spoke quite clearly when he quoted them. And since they are his words & not mine, then one must place his words over that of any doctrine of man.
Mt 22:36 Teacher, which is the great commandment in the law?
37 Jesus said to him, You shall love the LORD your God with all your heart, with all your soul, and with all your mind.[Dt 6:5] 38 This is the first and great commandment. 39 And the second is like it: You shall love your neighbor as yourself.[Lev 19:18] 40 On these two commandments hang all the Law and the Prophets.
Deuteronomy 6:5 “And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might”
Leviticus 19:18 “Thou shalt not avenge, nor bear any grudge against the children of thy people, but thou shalt love thy neighbor as thyself: I am the LORD”
And since Yeshua Messiah says that All Torah & Prophets hang on/from these two, that means they are never to be separated, but are to be handled according to these two great commandments. IOW, not my words, they are the words of "THE WORD".