Declaring a group or philosophy "off limits," and to say it "has no parallel," seems certain to eventually invite just such a parallel. Hitler didn't wake up on

Declaring a group or philosophy "off limits," and to say it "has no parallel," seems certain to eventually invite just such a parallel. Hitler didn't wake up one day, speak an incantation that resulted in possession by an eldritch creature of unimaginable evil, and then carry out plans for dehumanizing world domination. Dehumanizing the other, authoritarian fascism, and expansive conquest are common themes in human history, and what sets that era and group apart is more the confluence of all of those things with the time that technology made more horrific things possible than previous such events, and more easily documented than previous such events. Even in that era, Hitler wasn't alone among the Axis power to engage in barbaric atrocities, which only focusing on Japanese prison camps in mainland China makes clear. So no, absolutely not, those subject should never be off-limits. Already your desire to mythologize the holocaust may have caused you to overlook what was happening halfway around the globe. Certainly treating the holocaust as a special case that could never be repeated seems guaranteed to cause people to miss warning signs as those same principles rise in popularity again, as history shows they have and do and will.