If you look up the word used for “strangers” in the Greek text, you will see that he was speaking to his Hebrew cousins is the area below the Black sea.
I don't think so. He identified every city or area by name. This is Strongs for the word "strangers" in 1 Peter 1:1
(3927) par-ep-id’-ay-mos; from (3844) (para>) and the base of (1927) (ejpidhme>w); an alien alongside, i.e. a resident foreigner: — pilgrim, stranger.
That same Greek word is used in Hebrews 11:13. A word study of 3927 brought up this:
1) one who comes from a foreign country into a city or land to reside there by the side of the natives
2) a stranger
3) sojourning in a strange place, a foreigner
4) in the NT metaph. in reference to heaven as the native country, one who sojourns on earth
Philip