You need to do a bit more research , before issuing such an oft repeated , simply not true , statement !

There are PLENTY of non human species that kill for reasons other than pure survival . Believe it or not , fish can be some of the worst at murderous behavior with no survival at stake . Ever owned a home aquarium ? I have seen fish attack and kill other fish "just because" . Ever seen the nature shows where monkeys will attack and kill every member of a neighboring monkey clan , with no threat to their own survival to be cited as a "reason" for the murderous behavior ?

Yes , we humans can and do behave badly on an all too regular basis , but before you go painting all animals as innocent "victims" in the circle of life , please do some reading , you'll be surprised to find this widely believed falsehood just simply is not based in actual fact .