Studying the genetic basis for various characteristics is not eugenics, anymore than studying the atom is building a nuclear weapon. Abuse of knowledge should be controlled, but banning the pursuit of knowledge itself?
That's just intentionally crippling our own understanding of the world, for fear that we might not like what we discover. That's hardly an unprecedented behavior, to say the least, but the cultures that have gone that direction are probably not the sort we might want to emulate.
