Suicide is known to be a psycopathological affliction; the person thinks that there is no meaning of his life (on contrary, i think that thier death is as meaningless also).
We have another group of people who are known as suicide bombers. Now this sort of persons have a rationalization that whatever they are doing is for some cause, and is not a suicide but rather a sacrifice for thier nation.

Now my question to the august members of the forum is that: should they be really called as suicide bombers and does Islam has any room for this?

How their mind is conditioned and is there any clue that these persons are suffering from any psychological disease etc?

N.B: It will be highly appreciated if sm1 can brief this issue in the light of modern psychological terms and also in the light of Quran and Sunnah