APPROPRIATE REACTIONS, Undrawn Cartoons By Philip Bram:

ONE PANEL: Two workers are working the kill floor at a slaughterhouse full of pigs. MAN ONE is doing the killing with the hand held device while MAN TWO corrals the pigs up the ramp into the metal holding slot. 

MAN ONE: "Well, ya know, they say their emotions are almost identical to ours."

MAN TWO: "I believe that. We'd've made pretty good Nazis then right? Haha!"