As much as I dislike your husband for all of the shit he's put you through during your marriage, I certainly hope he hasn't completely lost his marbles. You're doing the right thing by having him evaluated by professionals. It sounds as if the emotional terrorism that the elders and his friends have displayed have gotten to him more than it has to you.
Now continue the professional involvement with getting a good lawyer and possibly a counselor for you. Be proactive, not reactive. The Watch Tower cult will attack you from every angle, so stand strong, and get all of the help you need to protect yourself and your kids.