Hello DF, FG here.hello FreeGrace, dirtfarmer here
It is my belief, based on 1 Corinthians 14:22, that tongues were for a sign to unbelievers. Those unbelievers were Jews that were saved but didn't believe that God was bringing Gentiles and Jews together in one body, the Church, and there was no difference between Jew and Gentile in the body of Christ.
Acts 10:45 , " And they of the circumcision were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost,"
How did they know that the gift of the Holy Ghost was poured out on the Gentiles? Acts 10:46, " For they heard them speak with tongues and magnify God, then answered Peter,"
My understanding of 1 Cor 14:22 is that the gift of tongues (other human languages) were used to evangelize unbelievers, not that unbelievers would speak in tongues, if that's what you meant.
I didn't understand the sentence: "those unbelievers were Jews that were saved but didn't believe God was bringing Gentiles and Jews together in one body". By definition, an unbeliever is unsaved.
1 Cor 14 is interesting. v.22 says tongues was a sign for unbelievers, and then the next verse (23) indicates that unbelievers hearing people speaking in tongues will think everyone is "out of their minds".
And v.22 contrasts the gift of tongues with the gift of prophesy, which is for believers. Then in v.24 Paul points out that the gift of prophesy will convict unbelievers of their sins.
I go back to Acts 2 where the newly indwelt and filled believers spoke in other languages (tongues) and the many visitors to Jerusalem were all evangelized in their own languages, even though the believers only knew their own.
I think the issue with Cornelius was that the Jews were so conditioned to think of Gentiles as inferior to them, that they were surprised to see Gentiles having the same gift as they were given. I think this is reflected in Acts 10:18 - "...So then, God has granted even the Gentiles repentance unto life." They weren't prepared for such a thing.