Bob wrote:
The best way to strengthen the gene pool is to become the target of
genocide.

Not if it is were thoroughly. The Germans killed six million jews and
there were twenty million in the world the. They were not thorough.
Besides which cultural adaptation trumps genetic variation. The human
race has been evolving by non genetic means since the end of the last
ice age. Culture is everything, race is nothing.

The instruments of cultural adaptation and evolution are memes, not genes.

Bob Kolker