Eh, life forms can have a exponential growth curve, so virologist and bacterial genetic research can easily kill a large part of the population. But then we are well on the way for that, so who cares?
Probably not. Genetics isn't nearly as clean a people imagine it to be.
Much easier to target one individual (and their whole host of genetic factors) than to target one genetic factor that can be associated with an ethnic group and pray that it doesn't either also express itself in an undiscovered way in other ethnic groups or have knock-on effects or the potential to mutate.
We aren't as genetically different as people imagine, and this sort of approach would be absolutely playing with fire.
One could even craft a virus that is targeting a certain behavioral anomaly like sociopathy, if its genetically clearly identify-able. All one would need is a proof-able potent carrier virus and once could reign in the destructive potential of humanity.
"No more bad boy behavior, or the bad boys vanish from the surface of the earth." behavioral deterrence via a biologic weapon.
What a fascinating nash equilibrium, the unsocial monsters, forced to be social, including applying gentle pressure, so they do not become history like there victims of the past. What a concept..
>One could even craft a virus that is targeting a certain behavioral anomaly like sociopathy, if its genetically clearly identify-able.
It isn't, and I'd be surprised if it ever could be. There will always be statistical correlations (especially when looking at multiple genes in combination) but you can't conclude what a person's brain and mind are like just from their genome.