UPDATE: Psy issued a lengthy apology to MTV News on Friday after the revelation of his previous anti-American rhetoric. Read it here.

The AV Club reports:

Busan Haps, a magazine about what’s going in Busan, South Korea has translated a series of articles from Korean publications about Psy’s longstanding and outspoken opposition to U.S. military presence in his home country. The “Gangnam Style” singer, amasser of $8.1 million, and “most-loved entertainer on the planet” has performed at two anti-American rallies, including one in 2002 where he had his face painted gold and smashed a miniature U.S. tank on the ground in response to the recent death of two South Korean schoolgirls who were run over by an American tank.

While that’s not so bad, all things considered, Psy also performed a pretty fiery anti-America rap at a 2004 rally for a Korean missionary who was beheaded in Iraq. As part of a sort-of-supergroup performing a Korean rock song called “Dear American,” Psy rapped, “Kill those f---ing Yankees who have been torturing Iraqi captives / Kill those ---king Yankees who ordered them to torture / Kill their daughters, mothers, daughters-in-law and fathers / Kill them all slowly and painfully.”

As one would expect, all of this hasn’t really gone over well with conservatives and pro-military Americans. Still, as Busan Haps notes, the protests were totally legal in South Korea, and what Psy did was well within his rights as an outraged citizen. His actions and feelings are also not uncommon: Protests are a frequent occurrence in South Korea, and after the death of the schoolgirls, a Gallup poll reported that 75 percent of Koreans in their twenties said they disliked Americans, along with 67 percent of people in their thirties and 50 percent of those in their forties.

Neither Psy nor his manager Scooter Braun have responded to the news yet, but the well-dressed singer is still scheduled to appear at the White House later this month.