Jesus did not say that he fulfilled the law for law for anyone.It aint us if we not elect. Its limited to whoever believes Rom 10:4
4 For Christ is the end of the law for righteousness to every one that believeth.
Everyone He did it for, will be given Faith in Him to believe that He did it for them.
In Exodus 33:13, Moses wanted God to be gracious to him by teaching him to walk in His way that he and Israel might know Him, and in Matthew 7:23, Jesus said that he would tell those who are workers of lawlessness to depart from him because he never knew them, so the goal of the law is to teach us how to know God and Jesus, which is His gift of eternal life (John 17:3).
In Roman 9:30-10:4, they had a zeal for God, but it was not based on knowing Him, so they failed to attain righteousness because they misunderstood the goal of the law by pursuing it as through righteousness were earned as the result of our works rather than pursuing the law as through righteousness were by faith, for knowing Christ is the goal of the law for righteousness for everyone who has faith. In Romans 10:5-10, Paul referred to Deuteronomy 30 as the word of faith that we proclaim in regard to proclaiming that God's law is not too difficult for us to obey, that obedience to it brings life and a blessing, in regard to what we are committing to obey by confessing that Jesus is Lord, and in regard to the way to believe that God raised him from the dead for salvation, so nothing in this passage has anything to do with Jesus removing our gift of salvation by obeying the law for us.