I heard a story once about two Rabbis, Moishe and Simon, who met on the street. They hadn't talked in a long time.
Moishe says, "So, Simon, how is it with you?"
"Not so good," replies Simon. "My son, Isaac, has become a Christian."
Moishe says, "NO! Really? It is funny you should say this to me because my son, Samuel, he has also become a Christian. This is very disturbing. We should do something about it."
Simon answers him, "What can we do? I know, let's go talk to our old professor, Dr. Greenburg. Perhaps he can help us understand why our sons have become Christians".
So they go look up Dr. Greenburg who is ecstatic to see them. "So, Moishe and Simon," he says, "what's been happening with you all these years?"
Moishe says, "Dr. Greenburg, you won't believe it. Simon and I both have sons who have become Christians."
Dr. Greenburg is obviously very upset at this news. "You know, it's funny you should say this to me because my son, Jacob, has also become a Christian."
Moishe cries out, "Dr. Greenburg, say it is not so. What can we do? We must understand why all our sons are becoming Christians."
Dr. Greenburg says, "Maybe we should pray. Maybe the G-d of our fathers, the G-d of Abraham, Isaac, and Jacob, can tell us what is going on down here."
So all the men kneel and Dr. Greenburg says, "Blessed art thou, O LORD our G-d, King of the Universe. We are deeply greaved. Our sons have become Christians and we don't understand why."
A voice from heaven answers, "You know, it's funny you should say this to me..."
Shalom.
Yes, the Apostles were Jews, Jews for Jesus. The early Church was mostly Jewish, Jews for Jesus. One of the biggest questions in the earliest Church was what place would the Gentiles have? This was, after all a VERY Jewish thing going on, after all, Messiah had come, as written in the Hebrew Scriptures that He would come, was crucified, as written in the Hebrew Scriptures, and was resurected again , as written in the Hebrew Scriptures. You mention how 3 Jewish men learned that their sons had found the Messiah of Israel and when they called out to Hashem, His response was the same. Why should you be suprised? I am a Jewish woman who has also put my trust in this Jewish Messiah Yeshua (who by the way was not a Christian). He lived His entire life as an observant Jew. If you want to read more about Yeshua, study the Hebrew Scriptures, because all of the Apostles and the early church knew Him only through what had been written about Him way before they met Him personally. You see, G-d writes prophecy as history. Shalom!!