I do not agree with the following arguments. I am just making them for clarity.
The Bell Curve does not assert that there are no intelligent members of the black race, just that there are fewer of them.
Likewise, it does not assert that there are no stupid white people, just that there are fewer of them.
You are confusing looking at group as opposed to looking at individuals. For instance, as a group, Hispanics are likely to have brown eyes. That does not mean that all Hispanics have brown eyes, nor does it mean that people with brown eyes are necessarily Hispanic.
The Bell Curve asserts that - as a group - Blacks are less intelligent than Whites. By definition that is a “racist” statement, but that does not mean it is necessarily incorrect.
Not accepting the results of research based on your preconceptions is intentional ignorance. If you believe that their conclusion is incorrect, do the research yourself and prove them wrong.
That is how science works.
I would also point out that IQ tests are not always accurate or necessarily a good predictor of an individuals future success in academics or in life in general.
https://www.timeshighereducation.com/books/kinks-in-the-curve/162800.article
Again, I tend to think while the statics are interesting, the raw statics alone do not account for social conditioning.
When a black child has a strong two parent household (or in the case of Ben Carson, a very strong and dedicated mother who pushed him to succeed) and an appreciation of and love for reading and learning and are taught values morals at home and to value achievement, they will more often than not go on to academic and economic success and score well on IQ tests. If they come from broken homes and or with no known father, a mother who is on drugs and are neglected and left to run feral, put in public schools that pass kids on even as they can't read or do simple math, more often than not they will fail in both areas and test low on IQ tests. But the very same can be said for white children raised similarly.
I just do not see a racially genetic basis for it. I know of now smart gene yet identified. But I do see a lot of social and social economic reasons for it.
In most Asian and in many Indian homes there is very push for their children to achieve academically and financially sometimes to an extreme, i.e. "tiger moms".
Even Murray co-writer Richard Herrnstein in the Bell Curve accept that environmental influences account for 20 per cent to 40 per cent of population variance, so should we focus on environmental manipulations to effect changes?