Being in denial might at the moment be the only thing that keeps her from breaking down. With all the media attention it might just horrify her that she could be seen publicly at the weakest, saddest, and most shameful moment in her life. She might also be trying to keep feelings of guilt at bay, after all she raised these monsters. She is trying to keep up a strong front. Fighting might be all she knows. Life in that part of the world certainly seems to support that attitude. But of course in this situation, and for outsiders, her behaviour comes across as more and more bizarre and crazy.
I think she should not be trashed. Nobody knows what really goes on in her heart. At the moment she is simply reacting to all that happened: her sons being terrorists, one son dead, the other facing DP, and media all over her 24/7. Not a situation I would like to have to deal with, and half of the time publicly at that. Denial, anger, crazy talk, is understandable imo. She might change after a while.