I know a lot about wolfs and admire them...but wolfs are completely different.
Wolfs attack other wolfs usually only when wolfs not belonging to the wolfpack enter in their territory or when a wolfpack is weak and other wolfpack attemps to catch their territory.
This is very different from Human and Chimp behavior...
As an example Chimps make expeditions to the territory of other chimps with the sole purpose to kill members of that other group and then they pull back to their own territory.
The purpose is not conquer territory, is not defend territory from invaders, is simply kill other chimps.
Also, the way they behave in those expeditions it's very similar to Human military operations , were all of them behave and move in a calm and silent (stealth if you wish) manner, very different from wolfs when they confront other wolfs where the confrontation is more "chaotic" and clearly more "hot headed".
Wolfs rarely kill wolfs of same wolfpack....it's really extremely rare as you know....usually simply showing the teeth or 1-3 bites solve issue w/o major physical consequences.
Chimps, OTOH, have no problems to kill other Chimps of same group if there is a difference of "opinion" about a subject/issue.
There is also a clear division inside Chimps groups with "political alliances"/whatever_you want_to_call that degenerate sooner or later in severe confrontations resulting usually in deaths.
Because of these reasons and a bunch of others too long to explain here , Chimps are at same level than us and we both are clearly different from other species that might be very ferocious by themselves but that don't confront each other inside same groups like us and Chimps.
I'm not talking about ferocity by itself but about will to kill same group members for reasons that sometimes are futile or the "military expedition" behave outside defending/conquering territory reasoning.
Not even Lions, Bears, White Sharks, Hyenas, Crocodiles, etc. behave this way.