Quote Originally Posted by denuseri View Post

In so far as getting violent...there is such a thing as a crime of passion, additionally, amongst primates it's not uncommon for the mated pairs to drive off even kill rivals but I doubt the op's case is in any way associated to this though it is most certifiably is where the natural response comes from.
Among humans, what we call a crime of passion usually seems to mean killing the partner who has left or threatened to leave (and, in an increasing number of cases, their children.) I defy you to find an animal equivalent to such an evolutionarily self-destructive behaviour.

On the other hand, in a human context it does make sense in terms of a collective need to control. In the same way that rapists are the allies of men who want to keep women clinging to them for protection, these jealousy-berserkers are the allies of all the men who want to be sure their partner daren't leave.