The school expelled the Tau Kappa Epsilon fraternity after it held the "unregistered, off-campus event" Jan. 19 at which students dressed in basketball jerseys and drank out of cups made of watermelons.
School officials said the party had "encouraged a racially insensitive theme and created an environment conducive to underage consumption of alcohol.
Cooper took to the air Thursday to lambast the students for their choice to host the party.
"Now I know you don't want to believe that something so racist and ignorant could actually happen in 2014," he said. "Frankly, it would be easier to pretend someone got the story wrong. After all there's no proof that this happened, right? There is. In fact they posted pictures of the party on Instagram with hash tags like happy MLK day, homies and blackout for MLK!"
"To me it is terrifying, terrifying that these people made it into college without learning anything about what is appropriate human behavior and terrifying they've got such an astounding lack of awareness and are so moronic about themselves and the world to actually post pictures of it like it's the spring semiformal or whatever," he added.
"Whatever happened to the good old-fashioned toga party," Cooper questioned, "Scratch that. I would not want to see what this particular group of morons would do if you gave them a bunch of white sheets."