Someone who invented and designed gas chambers in Auschwitz concentration camp is partially blameworthy for their use. (less if they were forced/unaware or the

Someone who invented and designed gas chambers in Auschwitz concentration camp is partially blameworthy for their use. (less if they were forced/unaware or there are somehow other mitigating reasons) The same goes for other designer of things that could be clearly put into primarily or only bad use.