I'm not sure I'd agree with that. I think that they can be under certain circumstances. As I said before, there have been plenty of reports of chimps forming what could be classed as raiding parties and hunting down an individual from a neighbring group. There doesn't seem to be any reason of competition for food or territory in most of the cases I've read about, but whatever the reason for it, there's obviously a degree of premeditation and organisation involved. I'm not quite sure if that counts as malice, but if it doesn't it's not too far off.
neighboring groups represent a very real threat to territory and food for virtually all animals.
a dominant neighboring male can be a danger to the weaker adults and females and especially young and infants of the group.
one need look no further than the former dominant alpha male in Gombe, Frodo...even Jane Goodall would not go near him without two bodyguards present.
the fact is that they go after dominant males, much like humans, and they do so in many cases by forging alliances, where they elevate the leader they want to the top position, and they do so, by beating the alpha male severely in many cases, precisely so that he knows he does not hold sway any more
what you spoke of, the targeting of certain individuals, occurs specifically for certain reasons...it is not done out of malice or spite.
Goliath, who was the alpha male when Goodall arrived, was eventually deposed by a lower rival, and as he aged, he became less and less powerful in the group...instead of accepting his place in the order he left his group (The Kasakela chimps) to form a brand new group (The Kahama)...he was later beaten and killed by the same group that formed the senior males of his old group.
and in fact, even Jane goodall has said that the elevated levels of violence and "Chimp wars" that were observed in Gombe, were the result of the interference of researchers such as herself in terms of them offering constant food to the chimps, so that they could be studied more closely.
"I didn't see aggression to start with. There's no question that chimpanzees become more aggressive as a result of crowding, as a result of competition for food. It's very hard to look back with hindsight and say oh well I would have done it differently. If I had gone to Gombe and had access to information about the effect of feeding bananas on wild chimpanzees I wouldn't have done it"
And in studies of several other groups of chimps in other locations, none of them have observed this heightened level of violence or killing over and above any normal levels of aggression, bravado and display
in fact , the prime evidence that they are *NOT* malicious, is that they choose display, bravado, and light violence, (beating with the hands) over more injurious or lethal forms of violence.
they will display, throw branches, rip bushes, shriek etc, to warn off possible further conflict...one particular male, "Mike", even learned back in the 60s that he could make his displays even more fearsome by incorporating many of the researchers every day tools into his displays (their metal cups, for example could be banged to make a fearsome noise)