I know how you feel, believe me, I do.
There's a certain attitude humans sometimes have: ''A human can't be replaced, but a pet can''. While I may not be ''one of the people'' that KingRanger mentioned, I do feel like slaughtering someone at times.
And let me add something a bit off-topic, while it is a scientific fact that we too are animals, it is our choice whether we want to act like savages or not, we are rational beings that have options to choose from, and if we ''act like animals'', it's only our choice.