(((((((((( Mouse ))))))))))

Everyone has a different system of parts so I can only talk about my system here.

The destructive parts tend to be child-parts that are holding great pain, that may never have been able to express that pain before.

An adult -part needs to come in and allow the child-part to feel whatever the child feels but in a safe way. So the adult can say, 'You are allowed to chuck stuff around, but I'm going to make it safe for you to do so by giving you only soft things to throw...' (A wet dishcloth is real good for this.)

This is just an example, let me know if you need more specific help.