"boo hoo, poor me, somebody said something that i find offensive!" do the rest of the world a favor and get over it, we have much bigger problems to deal with
Exactly: like the marginalisation of women, homosexuals, black people, Muslims, etc., usually via "harmless humour" that is grounded on false perceptions and unhelpful stereotypes.
Serious (intended) racism is harmful and offensive for obvious reasons; casual ("unintended" and/or "ironic") racism is harmful and offensive for less obvious reasons.
But it's still harmful and offensive, and so I think we should strive to resist it whenever it pops its ugly little unthinking head up.
