Judaism rejects Christ. The Jewish religion known as Rabbinic Talmudism rejects Christ. The Jewish people under that religious system reject Christ.
I believe you have a narrow view here that forces you to reject Judaism, or Rabbinic Talmudism (still Judaism), in order to accept or not reject Christ. But God's commands are not opposed to Jesus Christ. It is my belief that Jesus (Yeshua) observed and taught the Torah. He is the Messiah that was foretold in the scriptures. He is God's Anointed One. So, I both have nothing against Judaism or anything in Judaism, and have embraced Judaism as my own belief, religion, and faith. For a Jew who lives outside of the land of Israel we are no less a part of Israel. I was not born a Jew, but I am a convert.
I have said over and over again that all Jewish people who believe in Jesus Christ and all Gentiles who believe in Jesus Christ are one new man in Christ. In Christ, there is no Jew or Gentile. We are all the same in Christ.
Here is what you need to know.
Ephesians 2:1-22 NASB - 1 And you were dead in your trespasses and sins, 2 in which you formerly walked according to the course of this world, according to the prince of the power of the air, of the spirit that is now working in the sons of disobedience. 3 Among them we too all formerly lived in the lusts of our flesh, indulging the desires of the flesh and of the mind, and were by nature children of wrath, even as the rest. 4 But God, being rich in mercy, because of His great love with which He loved us, 5 even when we were dead in our transgressions, made us alive together with Christ (by grace you have been saved), 6 and raised us up with Him, and seated us with Him in the heavenly places in Christ Jesus, 7 so that in the ages to come He might show the surpassing riches of His grace in kindness toward us in Christ Jesus. 8 For by grace you have been saved through faith; and that not of yourselves, it is the gift of God; 9 not as a result of works, so that no one may boast. 10 For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand so that we would walk in them. 11 Therefore remember that formerly you, the Gentiles in the flesh, who are called "Uncircumcision" by the so-called "Circumcision," which is performed in the flesh by human hands-- 12 remember that you were at that time separate from Christ, excluded from the commonwealth of Israel, and strangers to the covenants of promise, having no hope and without God in the world. 13 But now in Christ Jesus you who formerly were far off have been brought near by the blood of Christ. 14 For He Himself is our peace, who made both groups into one and broke down the barrier of the dividing wall, 15 by abolishing in His flesh the enmity, which is the Law of commandments contained in ordinances, so that in Himself He might make the two into one new man, thus establishing peace, 16 and might reconcile them both in one body to God through the cross, by it having put to death the enmity. 17 AND HE CAME AND PREACHED PEACE TO YOU WHO WERE FAR AWAY, AND PEACE TO THOSE WHO WERE NEAR; 18 for through Him we both have our access in one Spirit to the Father. 19 So then you are no longer strangers and aliens, but you are fellow citizens with the saints, and are of God's household, 20 having been built on the foundation of the apostles and prophets, Christ Jesus Himself being the corner stone, 21 in whom the whole building, being fitted together, is growing into a holy temple in the Lord, 22 in whom you also are being built together into a dwelling of God in the Spirit.
Romans 1:16 NASB - For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.
Romans 2:9 NASB - There will be tribulation and distress for every soul of man who does evil, of the Jew first and also of the Greek,
Romans 2:10 NASB - but glory and honor and peace to everyone who does good, to the Jew first and also to the Greek.
Romans 10:12 NASB - For there is no distinction between Jew and Greek; for the same Lord is Lord of all, abounding in riches for all who call on Him;
Galatians 3:28 NASB - There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one in Christ Jesus.
Colossians 3:11 NASB - a renewal in which there is no distinction between Greek and Jew, circumcised and uncircumcised, barbarian, Scythian, slave and freeman, but Christ is all, and in all.
Perhaps you can explain then, why you insist on calling yourself a Jew when you are not.
I identify with Israel, Judaism, and Christianity, while remaining a United States citizen. On this website I have been told that I am a Jew. I observe Torah. I have also been told that I am or would be a Ger. I am a convert to Judaism, and I observe the Law. I am a Jew because I am a convert. Are you familiar with the terms proselyte, convert, foreigner, sojourner, alien, and resident? I do not live in the land of Israel, but as a Jew and a convert to Judaism (while retaining my Christian identity) I am both of Israel and more than a Gentile who observes the Ten Commandments and God's Law who dwells in the land of Israel. See Isaiah 56.
As for the word Gentile or Gentiles see the following links to verses that contain this word in scripture.
Gentile.
Gentiles.
You may also be interested in the term Greek or Greeks.
Greek.
Greeks.
Often the understanding of Jew and Greek is there in a person, even through reading the Bible and understanding scripture, before Israel and the Gentiles (nations). But again, a Jew is of Israel. I content that you do not have to be born a Jew to be a Jew.
Jesus was promised to the whole world, not just for the Jewish people/Israel, but for every tribe and tongue, every nation under Heaven.
Yes. The Messiah of Israel, the Messiah of the Jewish people, is God's Messiah. Even a Greek or a Gentile can believe Yeshua (Jesus) to be the Messiah.