[CharlotteSometimes]

Friend or not, he should sort the problem out. If he doesn't and it still bothers you, contact the company that hosts the forum in question and let them deal with it instead. I don't think there are any that would permit racist content to be posted on their servers, and I'm sure they'd take action to solve the matter for you. U2U me if you need to know how to find out which company hosts it.