Reductio ad Hitlerum, also argumentum ad Hitlerum, (Latin for "reduction to" and "argument to" and dog Latin for "Hitler" respectively) is an ad hominem or ad misericordiam argument, and is an informal fallacy. It is a fallacy of irrelevance where a conclusion is suggested based solely on something or someone's origin rather than its current meaning or context. The suggested logic is one of guilt by association, a classic confusion of correlation and causality, as if to say that anything that Adolf Hitler did, no one else should do, for it will obviously or eventually lead to genocide.
I...