Here's an idea that may just help with angry alters.

So your alters are mad? First of all I think understanding your parts is the first key but also to journal and talk to your parts. Are there children that are unable to verbalize there anger. Drawing or allowing kids and others to get communication open. I have found that is the only way for many. Journaling is such a powerful tool in your DID arsenal.
I don't think you need to write everyday and within your pages, the paper is good for drawing or just using colors for ones that are unable to use words to explain there anger. I have found many times over that when you reach out to your parts show them the crayons, write a note to those that are fearful/ Let them know your parts are okay, etc...

I really hope things work out for you..... you will be in my prayers,
Peace and love sent your way, Crew