> Large meta-analyses certainly always find correlation
No legitimate study has actually shown that such correlations are caused by genetic factors. However, numerous studies have shown that social factors (i.e. not having access to good schools, not having access to decent healthcare, etc, which statistically and historically correspond with racial divisions) play a major role.
So showing a correlation between environment and intelligence is clear proof that environment plays a role, but the same kind of correlation with ancestry tells us nothing? Even when economic [1] and environmental factors [2] are corrected for (to the best of our ability), and the differences persist?
No matter what the data is, you can always construct some convoluted theory by which ancestry doesn't play a role, just like you can keep adding spheres to make a geocentric solar system work.
[1] http://www.jbhe.com/latest/news/1-22-09/satracialgapfigure.g...
[2] https://en.wikipedia.org/wiki/Minnesota_Transracial_Adoption...
Really? The strongest rebuttals I ever saw boiled down to "it has not yet been conclusively proven impossible that all races are equally intelligent". Large meta-analyses certainly always find correlation, this one goes a long way towards showing there is causation as well: https://doi.org/10.1111%2Fj.1467-9280.2006.01803.x