You are lowering yourself to the level of these pseudo-scientists when defending your precious highly intelligent self. And they have a ready answer for you which is included in their “studies”: there are exceptions. No, dismiss them without becoming defensive, attack their weak points, ask for a race breakdown, for example, ridicule their conclusions.
You wanna be really effective? Attack the sources of their finances.
I think that few to none have become defensive on here. Where did this perception come from?
I think we all know the history of the Soviet Union and Red China, either way.