Who said "War is stupid, but sometimes you gotta fight anyway."?

This quote is attributed to Kenny McCormick.

War is stupid, but sometimes you gotta fight anyway. - Kenny McCormick

"War is stupid, but sometimes you gotta fight anyway."

Kenny McCormick War

"Mmph mmph mrmph!"

"I'm not fat, I'm just big boned"

"Dude, we're in third grade"

"This is so cool"

"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."