Plus, to make the "skin got lighter in Europe only over 10,000 years" argument, you'd have to have have a ton of deaths of people before they had children, and particularly as the result of having dark skin and without killing the whole population; have to explain why one or more random "albino" children came into being and were able to outbreed the native population through some number of generations; or adopt a belief in some form of lemarckian evelution.