Nobody is killing off people with white skin. Skin color is only a genetic trait that is not dominant and will not be carried forward into future generations in its' current form. So?
I have brown eyes. My wife has blue eyes. Brown eyes are dominant. Our son has brown eyes. Have I killed off blue-eyed people? No.
Your use of the term 'genocide' tells me more about your prejudices than anything.
Want DP delivered to your inbox daily? Subscribe here: