I am pretty sure you will never hear anyone say "red skin" except for me, Earendil. The red race has been pretty effectively written out of history, although the genetic evidence and obvious features stands as proof. These cultures have existed from one end of the world to the other, and they were building earthworks hundreds of years before the great innovators of the other races. Most of them mixed in with other races, and this can be faintly traced through genetics, and some survived almost completely intact like the Native Americas and some islanders. I really don't think you could talk with such force on this topic (as in, you obviously know some stuff) and yet not know of the mesolithic Europeans who were primarily coastal and eventually got bred out in most places except for some of the last Berber tribes in North Africa, the Basque, and some pockets in Scotland and Ireland. They never wrote books. They never fought in any recorded wars. They are mentioned as having mixed with different races, and when we look to genetic studies (I will not hold your hand and scour the Internet again just for you) we find that some of these historical mentions have some truth to them.

I know they have that one picture of Cheddar Man on wiki where he is quite ruddy and tan, and you are saying that he would be much darker, well, then perhaps the European reds are quite different in their genetic origins than the other reds of the Americas.