OK, so racism is fine unless you're white, then.Racism should either be unnacceptable in any form, or should just be brushed off by all for the ignorance that it really is.
that's not what I'm saying... I'm certainly not condoning racial abuse form anyone but I would argue that minorities have greater leeway socially.
for example some comics make observations based on race - a black comic is free to make observations on his own race and comparisons with say white people and can use both the n word and the word 'cracker' - the act in itself isn't racist but rather about race
a white comedian is also free to use the word cracker but would have to be extremely careful about context when (or even if at all) using the n word