Genocide starts with separating people into them and us, and this process starts with words.

> Genocide starts with separating people into them and us

This is an unsubstantiated slippery slope. We can categorize people, even sort them by desirability for some purpose, without resorting to dehumanization much less genocide. (Citizenship and immigration necessitate an us-them delineation. So do team sports, families and like club memberships. Us and them are fine. Us versus them is dangerous.)