Who said "Everyone deserves to be treated fairly and kindly."?

This quote is attributed to Butters Stotch.

Everyone deserves to be treated fairly and kindly. - Butters Stotch

"Everyone deserves to be treated fairly and kindly."

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."