Kathyanita,
I think I do know what you mean. They do not want to join together. Perhaps they are afraid to do this. Separate was the way to survive. The only way they know how. Maybe some don't understand that they can work together and still survive. They can work together and still be separate. The goal can be cooperation. You do not have to be single in the brain to be "normal" and happy. Does everybody there understand this? Does your T understand this?
I wish I could help with the destructive part. Maybe if we could find what this part feels needs to be proven the having to prove would stop.
Hoping you are safe. Keep whistling

I understand what you mean.
place