Well... why not go to counseling with him? He probably needs to be with someone alone, but its not the worst idea for you to go as well.
When my daughter needed some help through some severe depression my wife went the first few times. They had some things they needed to say to each other, and doing it in someone else's presence was helpful.
And in this case, you might be able to get him to go by making the first meetings about getting through this ordeal. He might feel better having some time to talk this out in front of someone else, and you might need to hear what the counselor has to say.
Then its likely that this incident will become the tree in front of the forest, and he will move past it to start to deal with his underlying anger.
So maybe make that appt for you both. I think it's a good idea.