The R group is what defines a cac. I don't think you understand how haplogroups work. The reason there is R is because that one core group migrated to europe. Those are what we consider white, so if someone says pure white, it would be like saying pure R origin. Pure the people that left the mountains. The R group comes from the mountains, not india, some migrated into india, but the core group who traveled to europe, the main branch, is what we catergorise as white present day.
I haven't migrated anywhere, I am original to my region, I haven't moved a continent away.