Yes, we would, and we have, that's why they can trace a certain "mitochondrial Eve" back to roughly 100,000 years. However, over time, these genomes mutate in very small, minute amounts until they become different enough to be in their own haplogroup. It took roughly 50,000 years for the Mongolian haplogroups to become distinct enough from the original Eve for them to be in their own groups.

The scientific facts also prove that if people from a different haplogroup other than the Mongolian ones came to America before Coronado and mixed with the natives, we'd know it, because the only thing that changes the DNA is tiny mutations that take, as stated, many thousands of years, not 2,000.

Smith wants us to believe that:

(1) Millions of descendants of Abraham once existed on the North American continent

(2) All those descendants of Abraham who mingled with native Americans and 100% of their entire family tree, spanning more than 2,000 years, were completely obliterated from the earth

(3) All those descendants of Abraham who DID NOT mingle with native Americans, and 100% of their entire family tree, spanning more than 2,000 years, were also completely obliterated from the earth

(4) 100% of the millions of Native American just happen to be from the Mongolian haplogroups and NOT A SINGLE person from Abraham's descent survived

I'm sorry but I cannot believe this. If your faith tradition forces you to believe this, then good luck to you, I have no problem with that. Forcing this belief as "fact" is where I have the problem. It is not a "fact" that Jesus Christ walked on water and it is not a "fact" that Buddha performed miracles either, even though there are many accounts of such actions. It is a faith tradition, and up to each individual to decide.