If you’re interested in the contours of this debate, I recommend Paul Gilroy’s “Postcolonial Melancholia”.
But if anything, time and history has shown us that even if you adopt the proposition that IQ scores measure something meaningful and some groups score less than others -- the situation is totally changeable and moveable. People become more educated, more skilled, share more culturally over time.
There is nothing intrinsic about IQ that cannot change. So to use is as if it means someone is "inferior" is just a fallacy or at best a blinded snapshot in time.
Don't use the concept this way.
If the cause of group differences in intelligence is found to be genetic then this will be of little avail.