Did everyone notice, when rallied upon one common foe everyone forgets their differences. If one person could take it upon their shoulders to alienate the whole world what would happen to petty disagreements?
that's because humans are the most complex creatures, that we know of, in existence. but sooner or later the bear will be dead, and you will go back to trying to murder each other because literally humans kill each other because we get bored.
I never said we wouldn't however animals in general are like this, an orca is far more intelligent than a human it seems, and they do similar things, or wolves as well. It is in all of our mind set, to preserve ourselves at almost all costs.