Ali jan, actually saying "let's kill all the black people" is an act, not an opinion!
But I know what you mean. I guess I meant all opinions as long as it's not agitation against an ethnic group!
When it comes to the forum, I thought we had talked about it a while ago that we (you) were trying to make the forum a democratic place which would be a good training for everyone to accept eachother's opinions in an almost all IRANIAN environment. That was a while ago so I guess you have changed that policy...and ofcourse it's your forum so I guess everyone should respect what you do with it!