Who said "You guys need to grow up"?

This quote is attributed to Kyle Broflovski.

You guys need to grow up - Kyle Broflovski

"You guys need to grow up"

Kyle Broflovski

"Dude, this is so messed up!"

"I'm not a jew, I'm a person!"

"Guys, we need to think about this logically"

"You guys are being totally unreasonable"