Sometimes it absolutely is.
Simple rule:
Left ‘blunder’ no matter heinous (Bill Ayres) how long the passsage (Bill Clinton), how direct the meaning (Rev. Wright), just needs to be understood because of the persons ‘experiences’ and ‘culture’ and ... you know the drill = “YOU have a problem for bringing it up - Move on! We need to talk about health care for all, etc.”
White or Right-win blunder, no matter how private or misunderstood (Trent Lott, et al), no matter how long ago (slavery), no matter how many apologies given or lives and treasure paid (Civil War, set asides, welfare, affirmative action) = “we will never let this go!”
Sneakyuser