Women don’t always get along as we live in a competitive world. Women can be best friends with other women but some have no problem becoming an enemy of one of their best friends over a small misunderstanding. These misunderstandings usually happen when men are involved. This is probably just a build in self defence mechanism that has been developed thousands of years ago when humans lived in small groups or tribes. The women would always be competing for the best men or simply the best man so they need to make sure that another woman isn’t going to take her place.
This might also explain why mothers and daughters don’t always see eye to eye as they can easily develope a love and hate type of relationship.
The following video doesn’t prove much of a point other than it can be very entertaining to watch two women slap each other.