No mercy. Vaporize them all. Hunt them down and vaporize them in the fastest most efficient way possible. Then kill all their families. The gene pool is infected. Kill them all.
This is NOT a gene pool problem. This is a spirit pool problem.
Not the perfect example but, Oh to have leadership with determination and resolve that is displayed here....
https://www.youtube.com/watch?v=UceGF3M56bE