Amen.
Fact is tongues were a sign to the Jew (unbelievers) not believers (1Cor.14:21-22) before the Fall of Jerusalem (70AD).
Tongues have two uses, one as a sign and the other as a gift. Tongues are a sign to unbelievers, yet 1 Cor 14:26 tells us to bring tongues to a church service. 1 Cor 14:22 he says that prophecy is not for unbelievers but for believers. Yet in 1 Cor 14:23-25, the unbeliever is repulsed by tongues and converted by prophecy. Interesting twist.