It is a very nice and a very comprehensive remark on the topic. You have provided sufficient evidence about suicide in Islam. Killing of innocent people is condemned in Islam and Islam does not allow a surprise attack without a proper denunciation of war.
Now, if we take this scenario out of our own country and look at the lives and miseries of the people of Palestine and Kashmir etc, we will find that many a suicide bombers who have emanated from these regions have targeted the military of the invaders. Same was the case in 1965 near Sialkot, where our brave Jawaans tied bombs on their bodies and laid under the tanks of Indian forces, and made one of the greatest graveyards of tanks in war history. Shan’t we call them as suicide bombers as well?

Besides, the psychological part of it is still un-explored because there are not sufficient studies on the subjects of this sort made by the west, and regretfully, we are not able to add a bit to these scientific grounds; Are these the circumstances, which conditions a mind for such a response or are these people suffering from any of the psychopathological or a neuropathological disorder and are already vulnerable to the permeation of thoughts like these?

The reasons which u have listed in this regard are found almost everywhere in our society, but not every one of them has turned into a suicide bomber