Human Rights: How do we protect the cognitively different?

So I was reading an article on MSNBC about the latest suicide attacks in Baghdad. Standardly I see militant actions of suicide bombers as choosing to remove themselves from the overall society at large and thus (While horrible) at least has a small sense of existential risk choicemaking involved. But this case threw me for a loop. It indicates the women who were the "Bombers" both had Down Syndrome. Since I don't know to which degree this diagnosis applied to either woman I cannot say too much. But if it was to an extensive enough degree then I can say that they were likely manipulated and may have been totally unaware of, or at very least incapable of understanding the existential risks. The bombs aledgedly were detonated remotely. This also implies they were unaware or incapable of awareness of the imminent death they faced.
Until now, as a largely peaceful and peace promoting person, I have tried to stay out of any blogging related to war efforts. However this changes that resolve, immensely. This takes it out of the war aspect and places it into a hardcore human rights venue for me. Any person or persons that choose to subject people to being blown up that they view as on their OWN side is not a person/group worth accounting for. I think that they just hurt their cause in untold ways. Apathetic as I may be towards the entire mid-east debacle (And I am partially due to media fatigue and partially due to knowing we lied about why we went over but we show no signs of leaving) this should outreage any person with any valuing for life at all. I think this might be a move that angers even the most anti-war activist. Good going Al-Qaida you just pissed off the the last people who were opposed to us being there by showing just how inhumane you really are.

OK now I am into angry ranting mode and need to let this drop for the time being. When I can be more detached and logical I will likely update more.