I think that most people who commit suicide resent the world they are in and want to lash out at it before doing so. It's more satisfaction than anything.

Simple take revenge from the world before your death for the reason why they made you commit sucide. Well you wuoldnt go empty hands to heaven appropriatley hell, you would take some people with you as acompany

They are so full of anger and hate many of them. They just get to the stage where they don't care. The world made them feel that way so they want to take it out on the world...so they think anyway. ;)

1) They are desperate and make other people responsible for their desperate situation. In some cases it could be some particular people, in other cases they just have developed hate against all humankind (hasty generalization). 2) "Mass murderers may fall into any of a number of categories, including killers of family, of coworkers, of students, and of random strangers. Their motives for murder vary. Many other motivations are possible, including the need for attention or fame. Workers who assault fellow employees are sometimes called "disgruntled workers," but this is often a misnomer, as many perpetrators are ex-workers. They are dismissed from their jobs and subsequently turn up heavily armed and kill their former colleagues. In the 1980s, when two fired postal workers carried out such massacres in separate incidents in the US, the term "going postal" became synonymous with employees snapping and setting out on murderous rampages. One of the 1980s most famous "disgruntled worker" cases involved computer programmer Richard Farley who, after being fired for stalking one of his co-workers, Laura Black, returned to his former workplace and shot to death seven of his colleagues, although he failed in his attempt to kill Black herself. In some rare cases mass murders have been committed during prison riots and uprisings. During the February, 1980 New Mexico State Penitentiary riot, 33 inmates were killed. Most of the dead, 23, lived in the Protective Custody Unit, and were killed by other inmates using knives, axes and being burnt alive over a 48-hour period. Unlike serial killers, there is rarely a sexual motive to individual mass-murderers, with the possible exception of Sylvestre Matuschka, an Austrian man who apparently derived sexual pleasure from blowing up trains with dynamite, ideally with people in them. His lethal sexual fetish claimed 22 lives before he was caught in 1931. According to Loren Coleman's book Copycat Effect, publicity about multiple deaths tends to provoke more, whether workplace or school shootings or mass suicides." Source and further information: http://en.wikipedia.org/wiki/Mass_murder#Mass_murder_by_individuals

Narcissism, depression, substance abuse or some kind of childhood trauma.

It depends on the individual, but there are trends - In cases such as you describe the motivating factor is actually not the suicide. In the case of many of these mass killing sprees which result in a suicide (looking at US high school shootings etc in particular) psychologists assert that the motivating factor is, rather than suicide, anger and disillusion with the over-riding desire to be notorious. It seems that the fame, and the acknowledgment, and the chance to go down in history for being evil is what drives them, more than anything else. They want to be notorius and known in death as they could not be in life. Which is why it is seen to be incredibly irresponsible that the media so deeply covers events of this type. One high school, or mass murder, shooting culimiating in a suicide is almost always followed by another soon after. Psychologists say that if these events were not talked about in depth, the killers were never identified, their photos not shown, and it never made big news with a running death toll etc etc then it is likely they would occur far less frequently than they do.

Three words...Misery Loves Company. :(