Thanks for the link. I will have to finish it later, but I did read some. I still do not see the connection between the link and converting to religion or belief though. But I would like to address some of what I read uin the link anyway if that is ok?
First I do not agree with the ideas presented concerning the priority of the Jew's as natural son's.
I personally tend to the view that the natural son's are as firstborn, and have a double portion of inheritance.
One portion pertains to the earthly inheritance given for this world and this life. Covenant of Circumcision in the foreskin of the flesh.
And the other portion pertains to heavenly inheritance for the next world and the next life. Covenant of circumcision in the foreskin of the heart
So yes Jew's have a portion not given Gentiles I agree. But the more glorious and excellent portion is the second. Which Gentiles are included.
Ge 17:5 Neither shall thy name any more be called Abram, but thy name shall be Abraham; for a father of many nations have I made thee.
Just as Israel entered into the earthly portion of the promises as spoken here.......Gen 15 covenant with the fourth Generation of Abraham's seed...
13 And he said unto Abram, Know of a surety that
thy seed shall be a stranger in a land that is not theirs, and shall serve them; and they shall afflict them four hundred years;
16 But in
the fourth generation they shall
come hither again: for the iniquity of the Amorites is not yet full.
17 And it came to pass, that, when the sun went down, and it was dark, behold a smoking furnace, and a burning lamp that passed between those pieces. {a burning
: Heb. a lamp of fire}
18 In the same day the LORD made a covenant with Abram, saying,
Unto thy seed have I given this land, from the river of Egypt unto the great river, the river Euphrates:
The second covenant, made with Abraham, beginning with the first generation of his seed, as
sole heir, is as AN ONLY BORN SON, as
sole heir.
Gentiles here share in this promise made to Abraham.
Ge 17:5 Neither shall thy name any more be called Abram, but thy name shall be Abraham; for
a father of many nations have I made thee.
That's just a hint of my read of scripture, as a noachide Messianic.
So yes, Jews turned to Christ remain Jew's, as they do keep the covenant of circumcision. Which covenant their kinsman in the flesh also keep. The earthly worldly promises still remain for those which keep the circumcision by faith. They are back in the land today because of their double portion. But in Christ, like Isaac as an only born sole heir, we all have been given the much more excelling portion in him.
