What do you mean by “just as capable”? This research studied a case where men did not band together, but that low status men behaved differently from high status men.
The finding is interesting, but wouldn't it be more interesting still if they had performed the same study with the sexes reversed also? We would then know for definite if there is a sex difference in behaviour. As it is we don't know. Women are just as capable of bad behaviour as men, and to think otherwise is to subscribe to the sugar and spice and all things nice school of sexism.
Also, imagine substituting men and women for black and white, or jew/non-jew, etc. I suspect the ethics board might be asking questions.
We know that lower-status members of a community tend to be more hostile to newcomers / outsiders. The specific question here was ‘does this apply in this particular circumstance’.
Incidentally, your agenda is showing.