Retrospective psychology indicates that, after tragedy occurs, reading into social media posts will only make matters worse. After a murderer/gunman has been identified, people will no doubt search his/her social media in order to find what might have possibly led to the incident in question. Seeing as there almost certainly has to be a motive for someone to commit such a crime, those searching the culprit will no doubt have already pegged him/her as a terrible person. Therefore, having preconceived notions of the personality of an individual who committed such terrible acts will give the public an idea that everything posted online prior to said tragedy taking place led up to the culprit's eventual breakdown.
I, for one, do not think it is fair to rely on somebody's social media for an accurate description of their personality - particularly after the individual has done something terrible. Nearly everyone who uses social media relies upon it for the sake of venting feelings, thoughts, and emotions on a regular basis. Posting such feelings, however, does not have to become grounds for judging someone's character. That is not to say that someone (in this case, the Washington shooter) is innocent. Instead, perhaps people interested in specifying the reasoning for his actions should look to his personal history, close friends/family opinions, and other information. There is much more character-defining information to be found in the opinions of one's close friends and family. For instance, I know of an individual who took his own life a few years ago, described by all those who knew him as someone who was always happy and loving life, bringing a smile and comedic relief to all those with whom he had contact. After the incident, all those who were close to him still had the same opinion; it was those who knew this man only through social media who read too far into his prior social media posts and took all the negative ones to mean something more than for what the posts were intended. Such negativity may have only been posted in "the heat of the moment."
In any case, while social media may potentially provide crucial information, it should not be used to judge somebody's character.
As this article states, some posts are made purely for the sake of boosting the poster's ego and perhaps gaining some sort of following from those who feel the same way:
http://www.huffingtonpost.com/2013/06/13/social-media-narcissism-twitter-facebook_n_3423095.html




