Sure, I can see how it is less of an indictment of someone's moral integrity if they were a white supremacist in 1860 vs today, but that makes the underlying ideology no less repugnant.
one-eyed JoeYou're right. I think historians and sociologists/philosophers etc will look at the particular time in history and if there were any people who were raising consciousness against something, they will judge that a particular individual was more reprehensible in believing it. So for example someone who lived in Bible times is less likely to be judged for accepting slavery than someone who lived in the late 1800s.
Therefore, there is no excuse for violent Islamicists who live today. Period.
By the way, LoL! Can't believe you felt the need to explain it was a parody!