I don't buy this completely. Because this question doesn't take into account other factors, Diet and environment being one such factor. I know where this is going. I don't like the path its leading us down. There is only one Terran race.
However beliefs and behaviours are not equal. Especially on an individual level, individual people engage in activity that is damaging to both that individual, and groups as a whole. (drinking alcohol while pregnant, smoking while pregnant, etc.)
Other times there are external third parties that can do things that damage groups through no fault of their own: Hexavalent Chromium in drinking water, Lead, Mercury, and Zinc poisoning, cancers that develop as a result of Agent Orange, etc,