Satan's counterfeit church being virtually every church until around the 20th century?
Kind of makes "real" Christianity fairly young.
No. The fact is that Christianity was considered a sect within Judaism in the first century.
When did that end?
It ended when Bar Cochba (forgive my spelling please) claimed to be the Messiah and the Jewish followers of Yeshua pulled out of the rebellion against Rome causing the rebellion to fail. That was when the final split from Judaism took place.
Now it was Augustine who instituted the allegorical method of interpretation for the purpose of de-jewishing the faith. Jewish elders were forbidden to attend the counsel of Nicea.
If one holds to a strict literal hermeneutic he ends up with the nation of Israel as the focal point of his theology. It is only when the literal interpretation is abandoned that replacement theology is presented.
The counterfeit church is Romanism, the Catholic Church.
The problem with evangelical denominations is that they lack a complete biblical Israelology. Which is very problematic in the study of the Law and the Prophets and the Writings.
And in terms of the Gospels and the Hebrew Christian epistles it is imperative to have an understanding of these writings with the light of a first century Jewish Believer's perspective.
The writings of Paul are written to the Gentiles thus they can be understood from a gentile vantage point. And this is important my Jewish beloved brother, the writings of Paul are pro Israel. Both the counterfeit church and the majority of evangelical churches adhere to replacement theology and that is how they excuse Christian anti-Semitism.
I am a gentile who believes the Messianic claim made by Yeshua based on my observation of the Jewish scriptures, I am a student of Ariel Ministries - Ariel.org