If you are going to move for an especially sensitive America--and you wish for this to extend even to comedians and other entertainers, then you cannot condemn some of them--while giving lip service where others are concerned.
I watch standup comedy, not a lot, but enough, and I don't recall ever seeing a white comedian making the sort of racial slurs such as what Don Imus made. Not in recent memory anyway.
17 years ago I laughed without a second thought at Andrew Dice Clay's ranting about Asians - "you can blindfold these people with dental floss!". How well would that joke go over today to a mainstream audience? Like I said previously, the zeitgeist has changed.
And isn't Michael Richard's career pretty much over after his recent racist ranting debacle?