My own understanding is the "Gate" promised to Abraham to be possessed by his descendants is our Lord, Yeshua.
Those who consider the Laws of Torah as the Old Testament, in my humble esteem, are more hung up on the law than what they accuse others of, for the promise to Abraham, being our Salvation, is the same witness from Abraham until Christ's transfiguration. Promise completed and fulfillment of Moses and the Prophets, amen.
I love all the Word, and I believe it, though complete understanding is not something I may claim. Just enough to be content with the Word.