I was involved in social services in the 90's on a reservation and "genetics" was one of those fun ways for people to give up (both the alcoholic and service providers "waste of money of those people"). I'm not terribly convinced seeing how different families have gone.

I think you've hit on one of the main reasons people get uncomfortable talking about genetic explanations for behavioral differences; it starts to sound like you're saying that some groups can't be helped or that there's an implied ranking of populations. Neither, of course, follows.