Animals should serve as models for us. They are gentle, cooperative, and family-oriented creatures who fight mainly over territory and mates and rarely kill one another. Humans being engage in group warfare and slaughter one another by millions. In fact, we stop behaving like humans and act like animals toward one another, as beastly as any beast.

I have read this paragraph over and over and I do not understand why this would be a contradiction. I am trouble and do not understand. Any help?

The first two sentences describe animals as gentle and rarely kill each other. The last sentence says that when people start killing millions of people we become beastly.

What a contradiction!