How many times does Father God talk about the 'Gentiles' in the Old Testament?

Where does Jesus say that He was sent to the "priesthood"?

He doesn't. He said that He was sent to the "lost sheep of Israel". That would include the Ten Tribes, who would technically be Gentiles.

The "body of Christ" is ALL Believers. NOT just Gentiles.

0. Father God, in the Old Testament, states several times that the Gentiles would come to Believe in Him. Jesus was the START of that process.

1. Luke 2 - The Holy Spirit told Simeon that Jesus would be "A light to lighten the Gentiles".

2. Jesus refused NO ONE, and even commended the Centurion for his "faith".

3. Jesus tells the Apostles to go and preach the Gospel to "all the world". That includes Gentiles.

4. Acts 9 - Jesus tells Ananias that Paul would preach to ALL peoples - including "the children of Israel". And the last half of Acts lists several synagogues that Paul went to.

Another thing that Pauline folks do - you take words and "phrases" that Paul uses to try to create doctrine. "Priesthood" is one of them. Then you try to connect it to "Israel is blinded".

Paul is actually talking about the Pharisees - and that they and their followers are those who are "blinded". Jesus mentions this. Why?

Because it's clear that the nope Messianic Believers are NOT "blinded".

ONE Gospel to ALL the World