I'll just copy paste the PM I sent to Joe in order to help clarify. As Sean said; use common sense and report anything that is inappropriate:
Known terrorist group support would come under rule 1 as it would be advocating violence against others, in addition it would come under FSE right. Nazi symbols will only be policed due to legal issues, this may impact on a few reenactment groups unfortunately. While FSE doesn't wish to burden itself by removing every symbol of every political group that may have sparked controversy in the past such as Soviet Russia; it will not tolerate threads that glorify violence perpetrated by such groups in the past.