Gene editing tools like Crispr-Cas9 cut into DNA strands and remove "targeted traits." The technology is well along in wiping out whole species like malarial mosquitoes.
The US military is investing...but they aren't looking to wipe out Iranians, North Koreans or Muslims by gumming up their genes. They worry the tech could wipe out the US.
Add the idea to your long list (nukes, asteroids, viruses and killer robots) of crap to loose sleep over.