Who said "I think you're being unfair"?

This quote is attributed to Butters Stotch.

I think you're being unfair - Butters Stotch

"I think you're being unfair"

Butters Stotch Justice

"I'm not bad, I'm just drawn that way"

"Aw, hamburgers!"

"You're grounded, mister!"

"I have to go do my chores now"

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."