I really dislike the whole concept of Judaic “roots”. Hear me out, its just labeled incorrectly and I hear it in the Church and in Messianic Judaism on a regular basis. Why do we call it the “roots?” Judaism was a flourishing tree before Yeshua came and it is still one today. Do we only want the roots and not the whole tree? By no means. We, meaning gentiles, are grafted into a tree. I want the whole tree, not just the roots. God did not intend for the Church to cut at the roots and start a new religion, yet that is what happened. Look at what Romans says:
Romans 11:16 If the firstfruit is holy, so is the whole batch of dough; and if the root is holy, so are the branches. 17 But if some of the branches were broken off and you—being a wild olive—were grafted in among them and became a partaker of the root of the olive tree with its richness, 18 do not boast against the branches. But if you do boast, it is not you who support the root but the root supports you.
Abraham, Isaac, Jacob and the books of Torah are the roots. The Prophets and the associated books is the trunk. Gentiles are a branch that was grafted in, and the roots and trunk supports Messianic Judaism.
Concerning Jews themselves, God still has a plan for them. They have not be replaced by the Gentiles.