Do your best to shield them from his anger, however you will never be able to shield them from pain. Speaking from experience, it's a fine line between comforting them from the situation and still being their parent. I would err on the side of being their parent. Even though they might not say or show it, kids thrive on structure and dicipline. Particularly in trying times like these.
Do your best. That's all you can do.
Everybody hurts. It's part of life. Don't miss the good stuff.