Are the true orthodox Christian Church the same folks who gave us the trinity? Taught dead people are alive? And God is in control of everything that happens? That the Four Gospels are written to Christians? And that water baptism is relevant? And also that we still have a sin nature?Unsurprisingly, you're missing the point.
The point is that the true orthodox Christian Church, represented here by the historical defenders of the faith Origen and Calvin, has always recognized the reality of Gentile Christians/believers.
As has every other recognized defender of the true faith since the NT was written.