Firstly, Native Americans are the highest % lactose intolerant people on Earth (80 - 100%).

Secondly, Chinese people and other East Asians also have one of the highest levels of lactose intolerance, followed by Central Asians. (80-90%)

African American people only have (75%) lactose intolerant.

Indians (people from India) are 70% lactose intolerant.

Latinos are 50% lactose intolerant.

British, German, French, Nordic, etc... are anywhere from 5% to 17% lactose intolerant.

This is really about Native Americans and Chinese... isn't it?