WHY do you CONTINUE to IGNORE the ELEPHANT in the room?
The letter was sent to...
Those Gentiles are mostly of the 10 tribes of lost sheep,who have been gentiles since the death of Solomon.
Your rejection of the word of God as one whole truth is staggering.
Israel is the bride, and yes they have been the adulterous, out of covenant, “not a people” gang for generations. The apostles were bringing them beck to being a people again:
1Peter 2:9-10
[9] But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light:
[10] Which in time past were not a people, but are now the people of God: which had not obtained mercy, but now have obtained mercy.
1Peter was written to the dispersed "strangers" of the northern tribes, whose story was told by the prophet Hosea.