You sound like you should brush up on your theology. Here, I'll give you a hand!
In John, we learn that some of those (including Jews) who claim Abraham as their father are really the devil's children. Jesus's words, not mine. Nothing about replacement there. We also learn that Abraham's children will do the works of Abraham - that is, believe on Jesus. So all those rejecting Jesus are equally damned, whether they think of themselves as Jews or Gentiles.
John 8:39-44
They [the Jews] answered and said unto him, Abraham is our father. Jesus saith unto them, If ye were Abraham's children, ye would do the works of Abraham.
But now ye seek to kill me, a man that hath told you the truth, which I have heard of God: this did not Abraham.
Ye do the deeds of your father. Then said they to him, We be not born of fornication; we have one Father, even God.
Jesus said unto them, If God were your Father, ye would love me: for I proceeded forth and came from God; neither came I of myself, but he sent me.
Why do ye not understand my speech? even because ye cannot hear my word.
Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
In Romans (in case we haven't learned it already), we learn that God looks at the heart. Not at which genealogy we claim, or our outward acts of "righteousness".
Romans 2:28-29 For he is not a Jew, which is one outwardly; neither is that circumcision, which is outward in the flesh:
But he is a Jew, which is one inwardly; and circumcision is that of the heart, in the spirit, and not in the letter; whose praise is not of men, but of God.
Hopefully you will now understand my position is the same as that of scripture, and we are indeed God's chosen people - all of us who believe on Jesus - whether we believe ourselves to be Jews or Gentiles.