Who said "War is always a failure of imagination, ooh-wee!"?

This quote is attributed to Mr. Poopybutthole.

War is always a failure of imagination, ooh-wee! - Mr. Poopybutthole

"War is always a failure of imagination, ooh-wee!"

Mr. Poopybutthole War

"Ooh-wee! That's the way to live, my friend!"

"You gotta embrace the chaos and make the best of it, ooh-wee!"

"True friendship is about showing up, even when things get weird."

"Sometimes the best moments are the unexpected ones, ooh-wee!"

"Some battles are worth fighting."

"Sometimes you have to become the monster to stop the monsters."

"Skynet sent me back through time to kill you."

"War teaches us the value of peace."