Is there any basis for a belief in scientific racism The case of monoamine oxidase A

It is often claimed that the idea of scientific racism has been discredited, but this is not really true. Barnes, Lisa L. : Bennett, Davis A. (2014) Alzheimers Disease In African Americans: Risk Factors And Challenges For The Future, Health Affairs; VOL. 33, NO. 4, April 2014. Curtis, David (2018) Polygenic risk score for schizophrenia is more strongly associated with ancestry than with schizophrenia, Psychiatric Genetics: October 2018 Volume 28 Issue 5 p 8589. Pinto, Rebecca: Ashworth, Mark: Jones, Roger (2008) Schizophrenia in black Caribbeans living in the UK: an exploration of underlying causes of the high incidence rate, British Journal of General Practice, 2008 Jun 1; 58(551): 429434.