are Gods chosen people still the jews, or are they the christians now ???
Given that there are Jewish Christians, why do you think this question is “Either/Or”?
I believe the particular expression “chosen people” is one that is used only for Jews. Christians are the ones united to God in the new covenant, His people, foretold by the prophets (eg. Jer 31:33) , but the expression “chosen people” is not a title used to identify us - at least as far as I know.
The Jews are still God’s people and in reading Chapter 11 of Paul’s letter to the Romans, they will yet have a role after the “full number of Gentiles” have come in.
God has a covenant with the Jews. He will be faithful to it. St.Paul says that,before the end of the world, the Jews will be converted. Christians are under the New Covenant, sealed by the blood of Christ.Through baptism, we share in the divine life, are made adopted children of God and heirs to heaven. We got it made.
The Catechism states this:
The people descended from Abraham would be the trustee of the promise made to the patriarchs, the chosen people, called to prepare for that day when God would gather all his children into the unity of the Church. They would be the root on to which the Gentiles would be grafted, once they came to believe.
The idea that God prefers one race of people over any other race of people is foolish tribalism, supremecism, and racism.
God not prefer one people over the others. He gave the Jews a special mission. It was a responsibity given them, not a special favor. And it cost them a lot, when they were not faithful to it.