If you believe Paul's claims. My view is that there is no "Jesus Christ's Christianity" at all, that Jesus was a believing Jew who would have been horrified to know what Paul would make of him.
And your basis for this is?
It's not that unusual for me to disagree with the New Testament.
That's a matter of faith. . .you do not believe the NT is the Word of God written. . .I do.
We will never agree when you are in disagreement with it.