1. IQ scores differ between race because of inherent differences in intelligence.

2. IQ scores differ due to outside factors such as racism and socio-economic factors.

Point 1 is racist, you provide no proof for it, and all studies I can find indicate that this is not the case.

So that leaves us with point 2, which is precisely the point the article is making.

P.S: Literally the first result when searching for "socio economic factors iq": https://pmc.ncbi.nlm.nih.gov/articles/PMC4641149/ It probably does not explain the full difference because there are more disadvantages such as racism, cultural factors.