After his YouTube video went mega-viral, the South Korean rapper named Psy received an invitation to sing and dance at a White House Christmas party. But it was quickly learned that in 2004, he had rapped lyrics wishing for the death and torture of American troops in Iraq, along with their families. Psy quickly issued a humble apology to the American people, and the White House reaffirmed that Psy’s show would go on. Was this the right thing to do?