The Apostle Paul had much to say to the gentiles about their relationship with the Jewish people, even warning them to not boast or become arrogant against them. Paul made these critical points in his message to the church at Rome, specifically Chapters nine through eleven. I have paraphrased and emphasized these below, and I believe scripture speaks plainly for itself.
The Root of Replacement Theology
I remember the day so clearly, sitting on my living room couch and holding an Old King James Bible in my hand. I was determined to discover the truth contained within. I very much believed in the one true God of Israel. So I said to Him, “I need to know the truth.” I had no concept of the Holy Spirit speaking to me, but somehow asking God to show me His truth made sense. As I started to read the book of Matthew, there was clarity and focus to the narrative. The story came to life, and remarkably the old English language was perfectly decipherable.