Anyone willing to accept the proposition that no people group is more primitive than another must also accept that sadistic, cannibalistic rapists and murderers are their peers.
We're speaking of intrinsic primitiveness, I'm sure you know.
Any human of any skin color is equally capable of doing evil—depending on their upbringing and environment.
No race has a monopoly on doing evil—or of being more depraved about it—than any other race.
If you don't think that humans of all colors practiced human sacrifice, cannibalism, unspeakable sadistic depravity, etc., then you might want to re-read the Bible, or conduct a more thorough review of actual human history.
Suggesting that there's any "primitiveness" which intrinsically adheres to one race more than another is the height of naiveté—and racism.
All racism is based on attitude. As such racism is not limited to any group or set of groups. Racism is nothing more than the attempt to elevate one group above another by demeaning one group in relation to another.
If "all cultures are equal," why don't all countries share the access to abortions that Americans enjoy?