I think sunshine has got it in one. Abusive, controlling relationships are peddled as exciting, glamorous and sexy, almost aspirational through music videos, films books (e.g. Twilight series,) and when life imitates art in the form of celebrities being in real life abusive relationships, it just reinforces it all.
It's likely that none of these young women have been at the sharp end of a an abusive, controlling relationship, or if they have, they've swallowed the whole line about how they should feel "special" because a man is jealous, possessive, takes charge, and all that baloney.
They possibly also believe this is what they are supposed to say and think, to be accepted, to be popular, to be regarded like those abused and controlled fictional and real-life heroines. They are playing by the rules of "the game" that says that the main purpose for women is being attractive, passive, sexually available, compliant and putting men and their needs centre stage at all time. Dissing other girls and women is one way of reinforcing this.
It's yet another example of that Choice Fallacy.