Can someone from the US explain what race even means in this context and how it is determined?
This is fundamentally different by intent than in Europe (using french here) where we refer to 'la race humaine' which is the _species_.
The nuance is critical during debates. While I was discussing racial differences to some Swiss folks, they thought I was talking Nazi propaganda! We are all part of the human species, the human species has many races. We are all equal!