I think their point is not to conflate scientific racism with the actual medical needs of different ethnic backgrounds. Nor to conflate either with scientific misinterpretation, or plain immorality, which is more what Kennedy is advocating for.

The author of the study sums it up quite nicely: the results of this study so not support inequitable vaccination. If we just claim Kennedy is trying to sort humans into different subspecies, that’s just going to muddy the argument that his stance is wrong and immoral.