I don't think Paul spent much time trying to convince the Judaizers in his day of their ignorance of the gospel truths and I think I will mimic him as far as you, also a Judaizer lacking in the gospel truths, are concerned.
You still haven't shown me a Scripture of a covenant between God and non-Hebrew Gentiles.
Jesus taught the Law and the Prophets just as Saul did. Both were rabbis, both were Judaizers.
All the twelve disciples were Judaizers. And they didn't change after they became born-again.
Saul, for one, remained a rabbi and Pharisee until the day he died. You want proof? Let's see if you are honest with Scripture:
24 Them take, and purify thyself with them, and be at charges with them, that they may shave their heads: and all may know that those things, whereof they were informed concerning thee, are nothing;
but that thou thyself also walkest orderly, and keepest the law. Acts 21:24.
26
Then Paul took the men, and the next day purifying himself with them entered into the temple,
to signify the accomplishment of the days of purification, until that an offering should be offered for every one of them.
Ac 21:25–26.
Purification rites under the Law. What? I thought some said the Law was "abolished" and "obsolete"? Nope. Not according to Scripture.
14 But
this I confess unto thee, that after the way which they call heresy,
so worship I the God of my fathers, believing all things which are written in the law and in the prophets: Acts 24:13–14.
5 Which knew me from the beginning, if they would testify, that after the most straitest sect of our religion
I lived a Pharisee. Acts 26:5.
23 And when they had appointed him a day, there came many to him into his lodging; to whom he expounded and testified the kingdom of God,
persuading them concerning Jesus, both out of the law of Moses, and out of the prophets, from morning till evening. Acts 28:22–23.
Saul, like Jesus, taught out of the Law and the Prophets.
Tell me...am I lying?
No, I am not.
Your bias against Jesus and Saul because they taught out of the Law is to stand in opposition to God.