If the allegation is true, I'm not seeking to excuse Bieber's behaviour. However, [imho], it seems like 19 year old JB is cracking up under the pressure of being the object of obsession for zillions of tweens. Plus: news of the recent death threats/kidnap plot can't be helping..
Zzzzzzzzzz. Plenty of stars his age have gotten things like that and have acted better. Jodie Foster comes to mind.