No, we do not reject all things Jewish. The Church is built upon this Jewish foundation. The things in the Law and the Prophets and the Psalms proclaimed our days. And indeed, God has not rejected the Jews. Indeed, this is what my website is all about. God is again visiting the Jews to call out the rest of His remnant. But this does not mean He has some separate covenant with national Israel.
Yes, we will celebrate the Feast of Tabernacles. Why? Because it is the Feast of the In-Gathering. And when the Lord returns, all will be gathered to Him. He has prepared a place for us. But it is only preparation for the eternal habitation.
We, the people of God, are His vineyard. We are the Zion of God. And we will rule with Him in His Kingdom as priests and kings, from Jerusalem. And His Law which goes forth from there is not that of Moses, but rather the Law of the Spirit of life in Christ Jesus.
I am about to write a post on the place of Israel, the nation.