My question is: Will all Jewish people be saved, even though many died not accepting Jesus as their Lord and Savior? God’s Word says God is not a respecter of persons, and if Gentiles are going to go to hell if they do not accept Jesus Christ as their Lord and Savior; why would God give eternal life to the Jewish people, if they die without accepting Jesus as their Lord and Savior? Jesus Himself said, “Ye must be born again.” In Romans 9:24-27 Paul says only a remnant will be saved. Also, I am interested in what you have to say about Romans 11:23-24, as it sounds to me as if they will not all be saved if they do not believe in Jesus when they die. I know most Jewish people and a lot of Gentiles believe the Jewish people will be saved even if they do not accept Jesus as their Lord and Savior.
"Therefore consider the goodness and severity of God: on those who fell, severity; but toward you, goodness, if you continue in His goodness. Otherwise you also will be cut off. And they also, if they do not continue in unbelief, will be grafted in, for God is able to graft them in again" (Romans 11:22-23).
Your reasoning is accurate. There is only one way to be saved. "Jesus said to him, "I am the way, the truth, and the life. No one comes to the Father except through Me" (John 14:26). The concept that there are two plans of salvation is a false one. "For there is no distinction between Jew and Greek, for the same Lord over all is rich to all who call upon Him. For 'whoever calls on the name of the LORD shall be saved'" (Romans 10:12-13). Calling means more than simply invoking Jesus' name or saying some ritual prayer. It means asking God what needs to be done and then doing as God instructs. "And now why are you waiting? Arise and be baptized, and wash away your sins, calling on the name of the Lord" (Acts 22:16).
Despite the simple requirements of God, the sad truth is that most people in the world will not submit themselves to God's will. "Enter by the narrow gate; for wide is the gate and broad is the way that leads to destruction, and there are many who go in by it. Because narrow is the gate and difficult is the way which leads to life, and there are few who find it" (Matthew 7:13-14). This is true of Jews and the Gentiles. It is sad to see this among the Jews because they had God's word for so long, but that is what happened. "Isaiah also cries out concerning Israel: 'Though the number of the children of Israel be as the sand of the sea, the remnant will be saved'" (Romans 9:27).