That would be from "National Lampoon Lemmings" 1973 ... a hilarious spoof of the Woodstock Festival ... pre-SNL, I believe it was Chevy Chase who yelled out that screed in the original soundtrack. Although your quote isn't exactly what he said, it's fairly close, and almost prophetic of what we see today.
~ MM ~
“That would be from “National Lampoon Lemmings” 1973“
Hilarious. That and Firesign Theater were sheer genius.
L