@rebeccasear
Yes, I'm aware that the IQ data for a large number of developing nations is essentially useless, but that wasn't what you were talking about.

The religious belief is in the implication of your post. The implication is that comparisons of human abilities are either:
futile because there is nothing to be found (you can't know that without doing them)
or
that description of the differences is immoral

Either of these implications is based on the belief that humans are blank slates, which is a religious belief.