No, not at all. Monkeys and primates sometimes have aggressive males and will even band up to drive out an overly aggressive male. There was a recent report that rangers in India were trying to catch a rogue male elephant that had gored to death six females that had refused sex. Basically in any herding animal, dogs for example, you can find a range of temperaments, including some animals that are more aggressive. Animals bully and rape, and force other animals out. Lone, older males prey on younger males and females. Also it's not unusual to find animals that kill and sometimes eat the offspring of their mates or of other animals. So the range of temperaments and behaviours we observe in humans, we find correlates of in animals and birds too.
