Not hard to see the difference in skull shapes.
Ping
“American Indians, were NOT the first Americans. Those Caucasian, oval-headed, hunters were the FIRST Americans”
It’s Vikings, Erik the Strong!!!
A few caveats, skull shapes change over time. In this case many thousands of years makes a big difference. Pleistocene human forms don’t exist in modern times.
Take a look at Cro-Magnon man which is considered a proto-european. There are no modern skulls just like that (closest affiliation seems to be modern Africa) but nobody is claiming it’s not a european ancestor. Just like Kennewick Man has a skull not exactly like anything modern (closest affiliation is south east Asia) but his genetics ties him to Native Americans.
“Oriental heads” - that morphology didn’t exist until the Holocene.
Native Americans are intermediary in physical features between Caucasion and East Asian which pretty much fits the genetics the article talks about. The same gene pool produced Holocene populations of Native Americans and Europeans and later East Asians.