His language hierarchy holds up, but thats not how this works . You can not heap personal catastrophic beliefs into a train waggon and by proof of chaining that train, your work is invalidated or valid and valued.

His academic works stand independent of the unsavoury character -similar to Werner von Braun. But that doesn't remove the fact he supported "any-but-american-imperialism" decorated with racists undertones ("the brown people can not be perpetrator and victims at the same time") and tried to undermine the western value based world order.