I always apologize too, for me it goes hand in hand with me accepting accountability, which is something I've always personally been pedantic about. MI isn't enough of an excuse for me to hurt the people around me.
While I do get how an episode can be likened to an epileptic seizure, the difference is that an epileptic doesn't inflict any hurt on their loved ones by having a seizure...
And no, I'm not saying you're using BP as an excuse to behave poorly, that's just how I look at it for myself, in my life.
Nobody can force you to feel ashamed of your actions, but apologies stem from remorse, which is not always tied to shame.
Me? I don't feel ashamed of how I may act due to my BP, remorse? Definitly, shame? None.
However my BPD reactions are always followed by both shame, guilt and remorse. Go figure...