Science has proven that Caucasian isn't a race, but a grouping of several different races: Europeans, Jews, Middle Easterners
Racialists, since the late 1800s, instinctively knew there were obvious differences and divided it further into different races. The wisdom of this have been proven by modern genetics.
1. White Europeans are their own unique race completely different than Jews or Middle Easterners.
2. Jews are not white but belong to their own unique race.
3. Middle Easterners are not white but belong to their own unique race.
Race mixing is driving the White race to extinction.