It's so beyond the pale, I believe it might be something with which the overwhelming majority of FR would agree. Many of us who spoke out against Terri Schiavo being dehydrated/starved are not easily offended, yet are horrified by the perceived legitimacy of Auschwitz graphics being posted on FR. You articulated that position very well on the linked thread.
After Rathergate, the MSM began watching FR in a big way, just HUNGRY for some means to discredit it and its posters. Look at what happened to NCPAC...he lost his job over a FReepmail post, fer corn's sake.
Now, whilst they watch, they see literally HUNDREDS of posts with Nazi imagery. It's not too far a leap for them to label us as Neo-Nazis all. After all, they won't be predisposed towards the interpretation the posters of such imagery want to project, and can simply spin it to mean that FReepers, and by extension conservatives, LIKE such images.
Just imagine the headlines.