Yeshua himself says he came to save sinners and those lost, not the righteous who are already in a covenant with G-d. G-d says no less than 30 times in the Tanach his covenant made at Sinai is eternal, and if the Jewish people follow it they will be righteous and he will be their G-d and they will have their place in the world to come. It is for this reason that Yeshua came for those outside the marriage covenant.
Also its important to note that Shaul ADMITS that the Jews will NOT accept Yeshua untill the end times (in which Yeshua will fulfill the prophesis and they will admit he is/was the messiah) it is unreasonable to think that HaShem would make it so the Jews cannot accept Yeshua yet, and not save his covenant people. Why? Becuase Yeshuas primary purpose was to heal the sick, to teach the Torah to those Jews who needed to be taught Torah, and to bring a way through which gentiles might come to HaShem also.
So the bottom line is this. HaShem has an eternal covenant with the Jewish people, those that keep the Torah have a lasting relationship with him. That is why the Pharisees were so shocked that Yeshua would eat and comune with the thieves and with the liers and with those who kept the Torah not. His reason for this is that he came to heal the sick, not the well.
Deuteronomy 30:1 - And it shall come to pass, when all these things have come upon you, the blessing and the curse, which I have set before you, and you shall call them to mind among all the nations, where the L-rd your G-d has driven you, And shall return to the L-rd your G-d, and shall obey his voice according to all that I command you this day, you and your children, with all your heart, and with all your soul; That then the L-rd your G-d will turn your captivity, and have compassion upon you, and will return and gather you from all the nations, where the Lord your G-d has scattered you.
Shalom and G-d bless
~Hix~