I was once involved with someone who faked ptsd flashbacks to the war in vietnam when he was provably taking photographs for a local newspaper in Canada. If someone deliberately throws themselves into an emotion, or 'flashback' so that they can then act out their faked emotional state, I am not really sure where the distinction lies.

You wrote:

what does 'primarily' mean and who gets to decide. What if it is fear or anger about something else entirely that then gets acted out in a different arena?

I don't see this nearly as cut and dry as you do in all cases.