But you are not God's if you don't believe in His Son
II John 10 "If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed:"
I John 2:22 "Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son."
I'm not saying they won't be saved,however it won't be while in the flesh,and it won't be just for them.
During this millennial reign of Christ, Satan will be bound so there will no longer be the religious deception and confusion that exists today, and people of all nationalities will have their opportunity to hear God’s truth, repent of their sins and receive salvation (Revelation 20:1-4).
It is very true that one is not saved without the Son. But that doesn't negate that the Hebrew people are elect or chosen. Isaiah said that Israel is God's elect. It is not because of anything they or anyone else decides, it is God's promises of the land to Abraham, Isaac, and Jacob (Israel) and their descendants. The land where modern Israel is situated is not Israel's land or anyone else's for that matter. It is a specific chunk of land that God has carved out of this world and claimed for Himself. And He promised it to Abraham, Isaac, and Jacob and their descendants..... forever. They are elect as a corporate body or nation. But salvation has always been on an individual level.
Even unbelieving gentiles were "chosen" or "elect" by God. Again, has nothing to do with salvation. Cyrus of Persia was God's anointed for the task of allowing the Hebrews to return to the land and reestablish the Temple in Jerusalem. He was "elect" or "chosen".
I don't quite buy the idea that during the millennium that religious deception and confusion will be eliminated. The Kingdom Parables paint the opposite picture and Ezekiel said that those of the nations who do not come to Jerusalem for the Feast of Tabernacles during that time will have rain withheld from their land. Satan may be bound, but it doesn't say that all the fallen angels are locked up.
The Kingdom Parables of the Leaven, Sower, and Mustard Tree show that sin and deception grow during the millennial reign. Leaven is always symbolic of sin and corruption in scripture. Yeshua warned people of the leaven of the Pharisees and in the Parable of the Leaven, leaven is hidden in 3 measures of meal, which from ancient times was always the fellowship offering. To hide leaven in 3 measures of meal (fellowship offering) during temple times was considered a stoning offense. And birds in the Parable of the Sower are shown to be the evil ones of Satan who snatch up the seed. And those birds are nesting in the Mustard Tree in that parable which follows the Sower one. The heart of mortal man remains sinful. And at the end of the millennium, when Satan is released, there is enough rebellion and sin for him to foment another rebellion against God. Psalm 2 is a picture of that time which supports Revelation 20.