The point is to recognize the humans on the receiving end of your judgement. They aren't inherently bad people. There was a series of events that led them to where they are, just like you. They are capable of all the same things you are.

Once you recognize that these people are human, you have a chance at maybe effecting some kind of change. Looking at them as animals means you will never effect any positive change, and you'll probably contribute to an even worse us-against-them kind of environment.