>>731038
There are several errors in this reasoning.
While it's true that some of them may be saved they are not saved BY invincible ignorance: they are saved by the Grace and mercy of God. The fact God is merciful should not make us disobey his will to preach the Gospel to everyone on Earth.
Second, we are not sure they follow natural law in that way, were Aztecs saved since they were under invincible ignorance? Not at all, they lived against natural law, practiced human sacrifices, they went to hell, and so did all tribes that practiced cannibalism.