You are wrong, there have been plenty observation of pointless killing across multiple other species. Look up surplus killing. We only differ in that we are far more effective compared to other animals.

In addition, we've also shown to be capable of far more empathy towards others of our own race and others, compared to any other species out there.

The simple truth is that if any other species had the destructive potential that we have, they would simply exterminate themselves without ever questioning their actions. So don't be so damn vindictive of humans when comparing us to animals.