5. A big part of the European gene pool is young - from Neolithic time.      

6.  Today’s East Asians have more Neandertal genes than today’s Europeans.

7.  It is easier to find Neandertal genes in today’s human population, than to find genes of moderns in the Neandertal population.

A simple unified explanation of several genetic issues on today's human population and on archaic humans - Per H. Enflo, Gustavo A. Muñoz-Fernández, Juan B. Seoane-Sepúlveda https://arxiv.org/abs/1705.08217