ANSWER: The apostle Peter taught that through Christ, and no other, could a person receive salvation (Acts 2:10, 12). EVERY being will eventually have to kneel before and acknowledge that Jesus is THE Savior of man (Philippians 2:9-11).
Jewish or not, any human who willfully and knowingly rejects Jesus Christ as their personal Savior will not be saved.
Ironically, in spite of massive efforts to preach the gospel by evangelicals and others, the overwhelming majority of humans have NOT followed the ways of God (John 1:10-12). This is not a problem, however, because it is part of God's plan. The Bible reveals that God calls people to Christ (John 6:44). However, GOD IS NOT CALLING EVERYONE NOW.
Will everyone have a FULL chance?
The Bible shows that God intends to raise up everyone in one of the resurrections, in His good time, and in their proper order. Briefly, in Revelation chapter 20 we find a description of the 1,000-year period we often call "the Millennium." At the beginning of the Millennium, Satan is bound and locked in a deep pit, to be released briefly following the Millennium (Revelation 20:1-3). At this same time, the time of Christ's return at the beginning of the Millennium, the faithful who have died come back to life in a resurrection (Revelation 20:4-5).
This is the time of the resurrection of the saints to immortality, spoken of by so many scriptures. Following the Millennium, Satan is loosed from his prison. He immediately gathers an army together to march against God's people, but ends up in the lake of fire, while his armies are destroyed (verses 7-10).
Following this is the time of the second resurrection and a time of judgment for the rest of the dead (Revelation 20:11-12, 15).
The resurrected dead -- including the Jews who rejected Jesus without realizing who He really was – finally have the books of the Bible opened to them. Sometime after that, the Book of Life is opened, and a search is made for the names of these people. If they lived their lives in the resurrection according to the things written in the books, there is every reason to believe their names will be found in the Book of Life. There is real hope for the BILLIONS of people who lived and died without ever hearing about God, Jesus, salvation, or living forever as children of God. That includes your friends and family members who may have died but who were not at all religious during their lifetimes. There is hope for them in the second resurrection, which is wonderful!
Most people will be in the SECOND resurrection. Those relatively few people God has called into the faith in this life, today, are often called the Body of Christ, but are also referred to in the Bible as firstfruits.
"He [God] chose to give us birth through the word of truth, that we might be a kind of firstfruits of all he created" (James 1:18).
As a whole, humans are cut off from God. Why are they cut off? Isaiah answers that we have been separated from our Creator due to our sins (Isaiah 59:1-3).
A growing number of people are becoming aware that this is the pattern in the world throughout history. The world loves to sin -- sometimes in the supposed name of God! God sees the rejection, and like a gentleman, He does not poke His nose in where He is not welcome. He leaves people alone to go their own way, make their own decisions and mistakes, and reap the rewards for their incredible misbehavior and disobedience.
However, God has reserved the right to raise up a body of firstfruits and call whomever He wishes into it, while the rest of humankind remains temporarily blinded.
What IS God's Plan for Man?
The plan of God is to leave the majority of mankind uncalled and in the dark until the time is right for them to be called. When is the time right? When God says it is -- it's God's timetable! God is working out His plan of salvation, involving the calling out of what the Bible terms the firstfruits now, in this age, and then calling the rest of mankind later, in the general resurrection following the Millennium. Ultimately, all humans will be given the opportunity to be saved. However, it must happen according to God's timetable.
Knowing this can help us understand why the majority of people throughout history and today have not shown any interest in Jesus Christ at all. We know it is God's will for people to be blinded and not be able to understand the message, even when Jesus Himself was standing there, in the flesh, telling them! It is God’s responsibility to decide whom He will call, and when He will call them.
We can see that the Jewish leaders of Jesus' dayoften reviled Him, and the Jewish people often followed Him only because they wanted to be fed with physical food (John 6:26-27) or to be healed of physical infirmities (Matthew 14:35-36). However, most of them were not ready to follow Christ the way we understand following Christ - a total commitment of our lives to living His way of life. They simply had not been invited yet. Once again, it is God's responsibility.
God is working out a plan of salvation among the human race. As part of that plan, God brings some people to repentance now, and others He will call later. The firstfruits are called ahead of the rest, not instead of the rest. There is nothing special about the firstfruits, except that God chose them before the rest of the world, and they had enough sense to listen to God and respond to His invitation.
We find references in the Bible that the heart is evil above all things, and desperately wicked (Jeremiah 17:9). We find that the carnal mind is antagonistic toward God, and cannot even be subject to the laws of God (Romans 8:7). We find that it is not in the heart of man to direct his own steps (Jeremiah 10:23). However, we also see that the devil has deceived the whole world (Revelation 12:9), that he is the god of this world (2 Corinthians 4:4), and that we need to put on the armor of God to stand up against the devil (Ephesians 6:11).
The Good News for Jews
The GOOD NEWS is that those who are Jewish who rejected Jesus did not know what they were doing. They did not willfully reject their Savior and Messiah. They just did not recognize Him, (John 1:10-11, Matthew 12:31-32)!
In Jesus' day, the eyes of the Jews were blinded. Even when Jesus was going around preaching and teaching, He often hid His meanings by telling stories and speaking in riddles and parables (Matthew 13:10-11).
The second resurrection, following the Millennium, will be when the vast hordes of mankind (including the Jews who initially rejected Jesus) who have died over the thousands of years of human history come back to life in a physical resurrection. This incredible scene, almost too astounding to grasp, is described in vision by the prophet Ezekiel, in his famous "dry bones" vision (Ezekiel 37:1-14).
These resurrected mortals will be given the opportunity to understand God's way and follow Him - the same opportunity that Christians in this life currently have, but with one important difference: Satan will not be there to deceive them or tempt them! In that future time, those who choose to pursue the goal of being sons in the family of God will be changed into immortal spirit sons of God, just as those in the first resurrection had been either resurrected or changed to immortal spirit when Christ returned at the beginning of the Millennium. The world will be filled with happy, peaceful, loving sons of God.