The "Nazi issue" was a minor aside in a larger discussion. However, Roxy-with-a-"Y" used that old Straw Man/Red Herring debate trick of making it in to THE whole issue. Basically, she was told to STFU because she was stirring crap and stating a lot of dubious "facts". She didn't like that, so she she decided to argue that she was in fact, engaging the board members in meaningful, deeply relevant discussion. Of course, Grey was being big, bad and evil, censoring poor Miss "With a "Y" and behaving like some totalitarian dictator.
The biggest, and ONLY issue here is this. ANY message board owner/admin has a right to set the agenda and apply personal editorial standards. If they ask you to chill out and you refuse then spend the day harassing them with PMs, you're asking to get your ass shown the door.