If your h is anything like mine (not saying he is..just IF), the idea of a support group is completely counter to their mindset. My h told me a while ago (not about DB but about a different newsgroup that I belonged to) that it felt like maybe I would listen to them before I listened to him.
I wouldn't overreact here...h is still reeling from his own guilt so he's reacting to that. If he brings it up again you can tell him that it's a "supportive" group -- people who have worked hard to save their m's. maybe that will help.
Sage
Relax. Appreciate. Be calm. Laugh. Enjoy. Be secure. Be loving. Be loved. Don't personalize. Don't ASSume. Accept. Be grateful.