Why do you continue to maintain an impossible illusion? Why do you want to construct some elaborate thought process and circumvent scripture?
Yes or no: Does the bible say that the new covenant is made with the house of Israel and the house of Judah? It's an open book question. Reference Hebrews 8:8 and Jeramiah 31:31.
I'll give you the answer. Of course it does. Now what is the "house of Israel"? It's composed of former gentiles AND physical descendents of the patriarch, Israel. "House of Israel" is another way of saying "family of Israel".
You may not be a physical descendent of Israel, but you are certainly a child of Israel.
Rom 9:6 Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel:
I can't believe I have to go through all this just to prove to you that yes, you ARE a son (or daughter) of Israel.
It didn't take you long to back off your assertion of the meaning of Eph 2. Now you run to another passage. Let me point you to one that may solve your problem and help your understanding. Read Gal3:26-29.
In Paul's day there were people like you who were trying to bind the Law of Moses on Christians. The Law of Moses is obsolete. You finally admitted that. Now try to understand that all men fall under the perfect law of liberty in Christ Jesus whether we be Jew or Gentile.
You are welcome to refer to yourself in any way and by any name you choose. As for me, I am a Christian, nothing more, nothing less.