Not quite sure what you are saying here - Jesus was speaking to the Jews to continue with their feasts and holy days and all the rules and regs of the Torah EXCEPT for the ritual sacrificial slaughter. Jesus came to be the final ultimate sacrifice for us all past, present and future. Jesus came to Paul after he was resurrected. No words were spoken about the Gentiles by Jesus until after that point. Take the Gospel to the Jews and if they reject you, kick the dust off your feet and head for the Gentiles - everyone needs to hear My Word.
That to me is the game changer that many of the Jews still cannot accept. They don’t have ritual slaughters any more, so now what can it be about? Your last line confuses me - so you are saying that a new race rather than religion came out of melding the Jew and the Gentile into Christians?