Pensees:
As has been shown in this thread, the use of Greek among Jews was highly discouraged.
ROFL, ah no
John 19:20
Many of the Jews read this sign, for the place where Jesus was crucified was near the city, and the sign was written in Aramaic, Latin and
Greek.
Acts 11:20
Some of them, however, men from Cyprus and Cyrene, went to Antioch and began to speak to Greeks also, telling them the good news about the Lord Jesus.
Acts 16:1
Timothy Joins Paul and Silas ] He came to Derbe and then to Lystra, where a disciple named Timothy lived, whose mother was a Jewess and a believer, but whose father was a Greek.
Acts 17:4
Some of the Jews were persuaded and joined Paul and Silas, as did a large number of God-fearing Greeks and not a few prominent women.
John 12
20Now there were some Greeks among those who went up to worship at the Feast. 21They came to Philip, who was from Bethsaida in Galilee, with a request. “Sir,” they said, “we would like to see Jesus.” 22Philip went to tell Andrew; Andrew and Philip in turn told Jesus.
Mark 7
26The woman was a Greek, born in Syrian Phoenicia. She begged Jesus to drive the demon out of her daughter.
Acts 17:12
Many of the Jews believed, as did also a number of prominent Greek women and many Greek men.
Acts 17:17
So he reasoned in the synagogue with the Jews and the God-fearing Greeks, as well as in the marketplace day by day with those who happened to be there.
Acts 18:4
Every Sabbath he reasoned in the synagogue, trying to persuade Jews and Greeks.
Acts 19:10
This went on for two years, so that all the Jews and Greeks who lived in the province of Asia heard the word of the Lord.
Acts 19:17
When this became known to the Jews and Greeks living in Ephesus, they were all seized with fear, and the name of the Lord Jesus was held in high honor.
Acts 20:21
I have declared to both Jews and Greeks that they must turn to God in repentance and have faith in our Lord Jesus.
Acts 21:28
shouting, “Men of Israel, help us! This is the man who teaches all men everywhere against our people and our law and this place. And besides, he has brought Greeks into the temple area and defiled this holy place.”
Acts 21:38
“Do you speak Greek?” he replied. “Aren’t you the Egyptian who started a revolt and led four thousand terrorists out into the desert some time ago?”
Romans 1:14
I am obligated both to Greeks and non-Greeks, both to the wise and the foolish.
1 Corinthians 1:24
but to those whom God has called, both Jews and Greeks, Christ the power of God and the wisdom of God.
1 Corinthians 10:32
Do not cause anyone to stumble, whether Jews, Greeks or the church of God—
1 Corinthians 12:13
For we were all baptized by one Spirit into one body—whether Jews or Greeks, slave or free—and we were all given the one Spirit to drink.
Galatians 2:3
Yet not even Titus, who was with me, was compelled to be circumcised, even though he was a Greek.
Galatians 3:28
There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus.
I Cor 9
19Though I am free and belong to no man, I make myself a slave to everyone, to win as many as possible. 20To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), so as to win those under the law. 21To those not having the law I became like one not having the law (though I am not free from God’s law but am under Christ’s law), so as to win those not having the law. 22To the weak I became weak, to win the weak. I have become all things to all men so that by all possible means I might save some. 23I do all this for the sake of the gospel, that I may share in its blessings.
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It is well known that Jewish People of that day also spoke Greek.
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So, your claim is just not true.