This seems to be a common (if dumb) policy among some conservative sites. They ban any content, even good, well-sourced original material, from a subjective list of taboo “racist” sites. It’s ultimately a self-defeating policy, as this article shows (the SPLC doubtless considers Stormfront and FR as two peas in a pod anyway).
Given the frequent uncomplimentary references to "Amish", you are correct.
Freerepublic.com is on SPLC's list of "active antigovernment groups(as "Free Republic")
Go start your own site and allow all the racist-sourced content you want and see how many conservatives want to hang out there.