Frankly I'm scared for your husband with the state he's in and for you,too.
I don't know what advice to offer you, but to perhaps reach out to veterans' groups to find out what they'd suggest.
Knowing what your boundaries are and maintaining them is very important. You need as much support as you can get.
Your husband needs to stop watching the news all the time. Can you get rid of the television? Would he agree to that or would he become violent?
Can he get an ESA of his own to help him with recovery and stabilization?