Firstly: field != person.
Secondly: There’s a reason why I wrote “social norms” — although I’ve honestly never heard of Gentzen, I knew someone would think of something along those lines.
If one is part of a society that does or supports doing things which we consider to be evil, the social norm of that society is inclusive of that evil, and one who openly and enthusiastically supports that evil is still following their society’s social norms when they do so. Social norms are what keeps science healthy — without good social norms, people would’ve responded to p-hacking etc. by saying “great, let’s all do it!” rather than trying to fix anything.
The importance of comparison with social norms is also sort of reason why people aren’t thrown into insane asylums for claiming that the literal creator of the universe has personally ordered them to eat each week a small token of unleavened bread which have been magically transformed into human flesh by a prayer in honour of the last meal the supreme being had with his mates that one time he took human form right before he prearranged his own temporary execution in order to give his non-mortal other self an excuse to not put people’s immortal souls into eternal damnation by default.
Also the broad reason why Washington is not heavily criticised for owning slaves.
None of this is to say that evil social norms are not to be challenged or fought against, just that it’s really really unusual to have someone who can both do that and avoid taking down Chesterton Fences.