There is an temporal covenant that stands for the Jews as long as the earth exists - and there is a salvific covenant.
Why is the temporary earthly covenant so important when you have a permenant salvation covenant, as a gentile, with HaShem? Why do you insist on stressing and claiming the less important and less permenant covenant?
To insist on claiming that which is NOT yours AS yours is coveting &/or stealing and a transgression of Torah.
A benevolent King called two subjects to Him to bless them for their service and devotion to the Crown. To both He gave great gold and gem studded brow bands that gleamed and sparkled. To the one he gave a magnificient ring of solid gold, to the other one of solid diamonds. But the one who had received the gold ring pined and worried saying "Why did He not give ME the diamond ring, THAT ring should have been mine, not his!" Eventually the King heard of the one's displeasure and called him to the throne. "What is this I hear that you are displeased with my gift?" The man with the gold ring could no longer hold himself back, "WHY?" he said, "did you not give ME the diamond ring instead of this inferior gold ring?" A cloud passed over the King's face as He said, "I gave you each equally from my treasures, because of the great love I bear you both." "I had hoped such a bountiful blessing would have brought you great pleasure equal to the great love I bear you. It grieves me that your heart is unsettled and disturbed and that you covet the gift of another. The heart of a man will reflect it's inmost thoughts by it's desire to own that which was given to another."
1Cor 7
18 Was someone already circumcised (a Jew) when he was called? Then he should not try to remove the marks of his circumcision. Was someone uncircumcised (a gentile) when he was called? He shouldn't undergo b'rit-milah (circumcision).
We are instructed here that it is NOT necessary to become Jews to have a relationship with HaShem - to become a Jew a man must have a ritual circumcision.
19 Being circumcised (Jewish) means nothing (to be sought after), and being uncircumcised (Gentile) means nothing (to be sought after); what does mean something is keeping God's commandments. 20 Each person should remain in the condition he was in when he was called. 21 Were you a slave when you were called? Well, don't let it bother you; although if you can gain your freedom, take advantage of the opportunity. 22 For a person who was a slave when he was called is the Lord's freedman; likewise, someone who was a free man when he was called is a slave of the Messiah. 23 You were bought at a price, so do not become slaves of other human beings. 24 Brothers, let each one remain with God in the condition in which he was called.