Why are people so quickly to raise an outraged flag of political correctness when asked to show some sensitivity? If friends don't mind ethnic kidding, that's fine. But an audience of strangers will include some who are offended, who don't listen to any disclaimer about historical accuracy, and who have a right to their feelings even if no harm was intended. As an old-time banjo player, I perform a number of minstrel-era songs, and feel free to exponge any terms liable to offend. If history is somehow violated, so be it. Attitudes change over time, and gratefully a lot of once widespread slurs are no longer acceptable. Words like "dago" and n-words and f-words etc. really hurt and really inspire belittling and hatred. I try not to judge those who are offended -- instead, I make an effort not to offend them. It doesn't cost me much.