The Righteous Convert is named Ben Avaraham, not Ben Yisrael, as the blessing is accredited to him.
Where would they get the Noahide laws from, if not from an Abrahamic religion?
What was the religion of Abraham?
Just sharing observations if ok
Abraham did not follow the religion of his forefathers
Jos 24:2 And Joshua said unto all the people: 'Thus saith the LORD, the God of Israel: Your fathers dwelt of old time beyond the River, even Terah, the father of Abraham, and the father of Nahor; and they served other gods.
Circumcision began with Abraham well after Noah & before Moses, and Abraham is the first person who God mentions when discussing Himself and commands this form of His name is to be a memorial forever eg
Exo 3:15 And God said moreover unto Moses: 'Thus shalt thou say unto the children of Israel: The LORD, the God of your fathers, the God of Abraham, the God of Isaac, and the God of Jacob, hath sent me unto you; this is My name for ever, and this is My memorial unto all generations.
God doesn't say 'I am the God of Moses and Noah'
Elijah used this memorial name
1Ki 18:36 And it came to pass at the time of the offering of the evening offering, that Elijah the prophet came near, and said: 'O LORD, the God of Abraham, of Isaac, and of Israel, let it be known this day that Thou art God in Israel, and that I am Thy servant, and that I have done all these things at Thy word.
It is because of God's promise to Abraham that Jews inherited the land of Israel.
Deu 1:8 Behold, I have set the land before you: go in and possess the land which the LORD swore unto your fathers, to Abraham, to Isaac, and to Jacob, to give unto them and to their seed after them.'
God shows special mercy to Jews because of Abraham
2Ki 13:23 But the LORD was gracious unto them, and had compassion on them, and had respect unto them, because of His covenant with Abraham, Isaac, and Jacob, and would not destroy them, neither hath He cast them from His presence until now.
It would seem from scripture that God considers Jews as Abrahamic?