Exactly, exactly, people feel it very uncomfortable to lean on results of Nazi researchers, no matter what objective scientific truth this research may have uncovered. It's like "objective" and "scientific" wane and disappear, because "Nazi" and "truth" are utterly incompatible in the post-war Western culture. We're lucky Nazi-tainted scientists did not discover something fundamental.
Under a more rational angle, any promising results obtained by an enemy should be double- and triple-reproduced, because an enemy may be planting disinformation into it. But this is a bit more serious than somebody you don't like making a comment you would rather have made yourself, and you already agree with the point because you would make it yourself and are now in a bind. That's the kind of uncomfortable situation I initially referred to.
Under a more rational angle, any promising results obtained by an enemy should be double- and triple-reproduced, because an enemy may be planting disinformation into it. But this is a bit more serious than somebody you don't like making a comment you would rather have made yourself, and you already agree with the point because you would make it yourself and are now in a bind. That's the kind of uncomfortable situation I initially referred to.