Different races, ethnicities and people differ in subtle ways. People metabolize different molecules differently. However that still is no excuse to repatent a drug.

I agree, but the correct approach is more akin to feature detection in web browsers than user agent detection. i.e. Check for the presence of a disorder like sickle cell anemia than checking the ethnicity and inferring the probability that such a condition exists.

Some drugs do have different impacts on different races.

Science is rarely politically correct (probably a good thing).

Or maybe it's just the politics isn't scientifically correct.