The Bell Curve is filled to the brim with shoddy pseudoscience and clearly supports racist ideas that have been thoroughly debunked as summarized here https://youtu.be/UBc7qBS1Ujo. If you want to nitpick on how “overt” it was, fine, but that’s not a charitable way to read an argument you disagree with at all. It honestly sounds like you just found one detail that you disagreed with to call the book tripe.