I am not sure if this is bipolar I am also borderline (BPD) and this sounds a lot like that. Especially the getting angry really quick and the threatening part. BPD can be very manipulative when angered and that is the kinds of things that I would do. Maybe read up on Borderline and see what you think - I could be wrong, but it you could have a duel diagnosis. I do - I have Bipolar I and BPD.

Maybe other people will see it differently.