Actually not totally true as I understand what you’re meaning. The Jews who today reject Jesus will again be given that chance during the Tribulation period. According to prophecy there will be 144,000 who are saved “till the end”.
Romans 11: 25 For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fullness of the Gentiles be come in.[See here that they are now blind to the truth “until the fullness of the Gentiles be come in.” After the Rapture of the Gentile Church (and of course the Jews who have accepted Jesus)]
26 And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:[This will happen during the Tribulation.
27 For this is my covenant unto them, when I shall take away their sins.
This happened when Christ came as the Messiah. St. Paul quotes from Isaiah prophesies on the coming of Christ:
"2 But your iniquities have separated between you and your God, and your sins have hid his face from you, that he will not hear. 3 For your hands are defiled with blood, and your fingers with iniquity; your lips have spoken lies, your tongue hath muttered perverseness. [...]
20 And the Redeemer shall come to Zion, and unto them that turn from transgression in Jacob, saith the LORD. 21 As for me, this is my covenant with them, saith the LORD; My spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed's seed, saith the LORD, from henceforth and for ever." (Isaiah 59)
Christ is that Redeemer and Deliverer. He has already come. He is turning away the ungodliness from Jacob and will continue to do so.