I'm very much in the Nazi fearing camp that prefers not to give credence to any science laming to find innate human tendencies in genetics. Exactly for the kind of discrimination that can result from it.

I have learned allot from The Blank Slate about the folly of ignoring the evidence in the name of Ideology even if it is my kind of Ideology.
I've also learned that the blank slate position is also the tool of totalitarian regimes.

I still think that any policy based on what we thing human nature is should be taken with a heap of salt, but ignoring human nature can be as detrimental as well and lead to policies that are disconnected from reality.