Reminds me of Oswald Teichmuller, complex analyst and dedicated Nazi. The ability in mathematics to absolutely prove results correct makes using the research of evil people trivial. I doubt Shinichi Mochizuki gave Teichmuller's membership in the Nazi party a single thought when he published Inter-universal Teichmuller theory, and certainly no one has called for Mochizuki's cancellation or the dismantlement of his research group.

https://en.m.wikipedia.org/wiki/Inter-universal_Teichm%C3%BC...