If what you say is true, we would not have this verse in Scripture, so after reading it you should think about this matter a little more carefully.
And the times of this ignorance God winked at; but now commandeth all men every where to repent: (Acts 17:30 KJV).
Just so there is no misunderstanding, here is the verse from the KJV 2000
King James 2000 Bible
And the times of this ignorance God overlooked; but now commands all men everywhere to repent:
So it should be clear that there was a time when God did not command the Gentiles to repent but left them to their own devices, but now He commands ALL MEN everywhere to repent. Why? Because that is what the Gospel teaches, and the Gospel must be preached to every creature.
Dispensationalism is an oral tradition of men not a tradition of God.
There was never a time,, not even the twinkling of the eye that he did not call all men to repent by purifying their hearts by and through a work of His faith ….. (Abel… repent believe the voice of God.)
He lovingly commanded Abel to repent long before he started using the Jews as shadow in parables through ceremonial laws . Purifying their hearts also by a work of His faith
Again he works in the same way in any dispensation. Why would a person make the faith of God without effect by not taking Him at His word?
Again he works in the same way in any and every dispensation.And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us;And put no difference between us and them, purifying their hearts by faith.
Act 15:8
Ask yourself…How much of a difference ?
The commandment is in respect to the outward Jew as it is written. Not all Israel are born again Jews..
It is God who has no form who calls men… turning them by a work of His faith so then after they are turned they them can to comfort themselves .Repentance is a work of God who is not a respecter of persons..