well bud i hate to tell you this but he was within his legal authority being in school you are supposed to follow the rules that are made by the school board and one of wich is a dress code. i completly undrstand your frustration and the fact that the klan can parade up and down the street does not give them the right to parade up ad down the halls of your school. you are allowed to wear the shirt in public and parade up and down the street screamng it at the top of your lungs but if the principle thinks its promoting illegal acctivity then he will ask you to remove it. would it be right if it wasnt a pot leaf and a person geting their throat slit on it? same argument.

bythe way i got sent home from school once for almost the same thing but mine was a buckeye leaf and said ohio state, but they thought it was a pot leaf.