Grace is a big tent. Does God overlook ignorance?
Acts 17:30 And the times of this ignorance God winked at; but now commandeth all men every where to repent:
And what's the bar? "Righteous Lot"? 2 Peter 2:7
Genesis 18:25
25 That be far from thee to do after this manner, to slay the righteous with the wicked: and that the righteous should be as the wicked, that be far from thee: Shall not the Judge of all the earth do right?
On the one hand, where there is no law there is no transgression.
Romans 4:15 Because the law worketh wrath: for where no law is, there is no transgression.
But on the other hand, when the Gentiles "do by nature" the things contained in the law, they are a law unto themselves....their CONSCIENCE bearing witness. Romans 2:14,15
Here's my understanding. Even the natives in deepest darkest Africa have a conscience. They were created to know right from wrong. God will do right. I'm not the judge, and I can't see into their heart as God can.