If God has no plan why were there prophets foreshadowing Christ centuries before he was even born?
God kept reaching out to His People. But we humans, as imperfect as we are, kept misunderstanding Him. Plan? The Church was only for the Jews, according to Jesus. Yet the salvation of the Church was the reaching out to the Gentiles. The entire New Testament was written in Greek. What? Greek? Not Hebrew, not Aramaic, not Syriac. Greek. Some plan. Jesus tells the Apostles to stay away from the Gentiles and that turns out to be the salvation of the Church. The Greeks are the closest to the original Church, as well, to this day.
The Jews who existed during the time of Jesus had no clue as to His being. They were looking for a super David who would lead them to world domination. And that is how the Synoptics are written - as if Jesus was not God, but a super David, an even more favoured of God. Jesus went far beyond the prophesies, but, just as important, He did not fulfill the temporal prophesies as understood by the Jews of the time
Why do you think that the Council of Jamnia finally and completely severed the ties between Christianity (which had been considered a Jewish cult) and Judaism?