Yeh -- it is where a lot of the Jews who left Israel proper went to when they saw the armies of Rome begin to descend uupon the Holy Land after the death of James the brother of Jesus as Josephus also notes. You call them strangers, I'll call them sojourners. Get real --
These Jewish Christians remembered the words of Jesus about the coming days of vengeance, took heed to those words, and many of them sojourned to northern Asia Minor. You just can't stop writing your own history. That's fraud. The Jews lived all over, in Egypt and in Greece and in Asia Minor (modern Turkey). IN FACT (an alien word for you, obviously), they lives do LONG outside of Israel that their generations spoke Greek!
But these Jews to whom Peter was specifically writing were the ones who had just migrated up there to the area from the Holy Land as they saw the trouble coming to their homeland around the mid 60's AD. Thus Peter addresses his letter "to the strangers/sojourners" -- they were strangers to the area after having moved up there from Jerusalem and Judea
It's one thing to learn how to speak market Greek and another to write sophisticated Greek mixed with Greek philosophy and developed theology. Remember, even Acts say he was unschooled.
Unschooled until the day of Pentecost when God gave them the gift of tongues. He learned his Greek from the Master himself as many on that day no doubt did -- it was Pentecostal Greek -- that's why it was so good.
And while there were additional migrations after the destruction of Taemple in jerusalem in 70 AD, the real exodus of the jews form Palestine did not occur until 135 AD. In and around 50-60 AD the Capapdocian and other Asia Minor Jews were not persecuted, either as Jews or as Christians. So, your theories are not historically tenable.
Unschooled until the day of Pentecost when God gave them the gift of tongues. He learned his Greek from the Master himself as many on that day no doubt did -- it was Pentecostal Greek -- that's why it was so good
Better than Paul's? Because it is. And yet God di not grant the same finesse to Peter's follower Mark, who wrote the Gospel in simple and unpolished Greek.
You are making an assertion that you cannot prove.