I think the idea is that he was a Jew but welcomed gentiles into the faith so technically all Christians are Jews in the eyes of Jesus.
Jesus didn’t came here to create Christianity, he was the fulfillment of a Jewish prophecy, Christianity exists because some Jews didn’t believe he was the Messiah.
IIRC he also said that jews could be christians while keeping their jewish traditions, which is worse for those fake christians.
I think the idea is that he was a Jew but welcomed gentiles into the faith so technically all Christians are Jews in the eyes of Jesus.
Jesus didn’t came here to create Christianity, he was the fulfillment of a Jewish prophecy, Christianity exists because some Jews didn’t believe he was the Messiah.