People with racism will look for any means to suit their end. I understand what you mean but It seems that you should vote on the other side. "Science and everything else racists use to justify their cause"
Criminals can be identified by genetics. The feebleminded can been helped by controlled environments, a sort of therapy if you will to help them have as much harmony with society without lashing out. Also, there are genetics more preferable than others. Good genes result in Long Life, Quality of Life, Resistance to disease (Hardy in handling nutrition), etc. Also, evolution would have it that certain races evolve ahead of other contending races. Nature's race (like a sprint) toward human perfection - and not just humans but all species running toward perfection. If you take the more modern and civilised nations, their rewards they reaped from what they sewn are gifts from intellectual faculties. The more civilised nations later to become Greece and Rome had more material because of the Age of Reason... while other less reasoning humans had less prosperity. It's kind of obvious.