For me, Christianity began at Antioch when certain congregations began to accept teachings against our forefathers, A"braqham, Isaac, and Israel
Had this first calling of the followers of Jesus Yeshua and the Twelve Apostles never occurred, all would recognize the first Hebrews as our blessed caretakers of the Word utile the first Advent. We would not refer to the Resurrection of our Lord as Easter Sunday, and we would know the will of the Father, the Son and the Holy Spirit more closely.
Not to worry, that was just a boost toe the apostasy which had already been in progress, and it continues to this day. "This is why we have so many sects and denominations under the heady of Christian.
Again, not to worry, for they came into being with the Advent of our Savior, Jesus Yeshua.
And once more, not to worry, for the time is coming and perhaps already begun when our Father will call His children out of the Great Whore , apostolic denominations, an d the Holy Spirit will teach all. .
This tells me there are believers in all denominations yet to be called out of her.