When I learned about Indians coming from the Bering Strait as a kid, I never believed it. Too simplistic for me. I tend to believe that the first Americans came by boat from the South Pacific and went north. The second wave would be from Europe, Cro-Magnon man. I remember reading Mayans, Incas, and Mapuches have the same rate of Rh negative blood as Basques, Celts, Guanches, and Berbers. In fact, when Spaniards encountered Incas, they reported seeing faired skinned and red haired people among Incas. They also found red haired mummies in Peru.
Sounds like a good start for a country song.
Some new information on this at the following link.