It's fascinating that my comment above rebuking racial purity theories is so controversial (evidenced by the oscillating down and up votes for a full day), yet

It's fascinating that my comment above rebuking racial purity theories is so controversial (evidenced by the oscillating down and up votes for a full day), yet there are no follow up comments supporting racial purity theory in general, just a discussion about the relative genetic isolation of one group? It's surprising that rebuking racial purity as a concept would be so controversial today on a forum like this.