I'm not sure how to make our view any more clear. Let me try this.
You just don't get it! I have no problem understanding your "view" I just simply disagree with it because it is a HALF truth joined with pure eisgesis.
What was revealed to Peter in the white sheet dream that he was not already aware of?
His personal Biblical literacy is not the issue. The truth is not based upon his personal knowledge or lack thereof. The scriptures clearly taught a chosen seed from among the gentile nations since the time of Abraham as it was part of God's explicit promise to him. Nothing but Gentiles were saved prior to Abraham as God's chosen people in the LINE OF SETH - all gentiles. The gospel has been preached by ALL THE PROPHETS from the first prophet Abel and God personally preached the gospel to Abraham (Jn. 8:58; Gal. 3:4-6; Rom. 4:22-25). Isaiah and the prophets predicted precisely what God revealed to Peter.
The specific issue I have with your interpretation is that you are attempting to make a UNIVERSAL TRUTH, meaning a truth not confined to any specific period of time or any specific people, restricted to the Jews in the life of Christ JUST BECAUSE THAT UNIVERSAL TRUTH APPLIES TO THEM. John 6:37-65 EQUALLY applies in all ages to the elect and to those who oppose Christ as preached in all ages (Acts 10:43; Heb. 4:2)
What were the Gentiles being grafted into and the Jews being cut off from in Romans 11?
The short answer is God's PRESENT RACIAL SPHERE of redemptive activity. The grafting in and cutting out have nothing to do with individual salvation or damnation but the PRIMARY RACIAL SPHERE where God presently chooses to call out His elect. Presently that PRIMARY RACIAL SPHERE of redemptive activity is among the Gentile nations. Prior to this the PRIMARY RACIAL SPHERE of redemptive activity where God called out HIs elect were among the JEWISH people. Prior to Abraham the ONLY RACIAL SPHERE of redemptive activity was among the Gentiles and specifically the family line of Seth.
Your error is that not only you confuse ELECTION of the TEMPORARY sphere of racial activity by God which has NOTHING to do with personal salvation or damnation with the ELECT REMNANT which has everything to do with individual salvation but you also REVERSE their significance in relationship with each other in regard to election.
The former is merely a chosen RACIAL EMPHASIS but does not entirely exclude INDIVIDUAL ELECTION TO SALVATION from the RACIAL sphere that is not emphasized. The latter is nothing but individualized election to salvation that is always in keeping with the RACIAL promise to Abraham as that promise of an elect seed has always included both JEWS and GENTILES.
The election of the PRESENT RACIAL EMPHASIS is always SECONDARY in significance because INDIVIDUAL ELECTION is never restricted only to that present racial emphasis.
The ELECT INDIVIDUALS are primary while the ELECT SPHERE OF REDEMPTIVE ACTIVITY from which those individuals are saved is secondary.
1. Between Adam and Abraham the elect sphere of redemptive activity was PRIMARILY restricted to the family line of Seth.
2. Abraham was both GENTILE and JEW. His lineage was GENTILE
3. Between Abraham and Paul the elect sphere of redemptive activity was PRIMARILY restricted to the family of Abraham (although a Gentile seed was always included and always some elect were being called from).
Your error is that you are taking election of racial emphasis, which only identifies the present sphere of primary redemptive activity from among whom God is calling out individual elect to personal salvation, and attempting to repudiate what that GENERAL but not exclusive choice is designed to serve and that is saving ELECT INDIVIDUALS regardless of race as in all ages God calls out both Jews and Gentile elect individuals regardless of what the racial emphasis may be at the present time.
What did that vine represent exactly?
The metaphor of relationship between the believer and Christ regardless of what the racial emphasis may be at present. When Jesus was speaking the present racial emphasis from which God was calling out individual elect was the JEWS, but now, it is the Gentiles. However, regardless the metaphor fits any elect at any period from any race.