I'd say suicide bombing is widely regarded as an act of cowardice, often due to the fact that it often involves women and children and its victims are often non-combatants.
With respect to this discussion, I can see both sides. Possessing an awareness of our nation/government's many faults and a willingness to discuss them openly is extremely healthy. {As should be the case for a citizen of every nation, since none are perfect.}
That said, I think it's best to exercise a basic degree of respect and courtesy when going on the record about government officials and particularly the military. You can criticize without being an asshat.