Hopefully we will learn something about the motivations for this attack. So often terrorist are either, killed, lawyer up, are mental basket cases, or detained in some prison indefinitely. So we learn little about their thought process and why they did what they did. I've talked to a number of people about this thing and the one question that keeps coming up is Why.
I have just been listening to a friend/acquaintance of the suspect, Dzhokhar Tsarnaev, who, as many others who know him have indicated, says this was a normal young man, not anti-American, not very religious, not violent or preoccupied with violence, etc. Just a regular type kid who played sports and went to college. They don't seem to think he was leading a double life or hiding anything so much as they think he was influenced by an older brother, a brother who was 7 years older and a surrogate father as Dzhorka's own father lives far away in another country.
I'm not intending to excuse this kid's behavior, but responding to the discussion in the previous post: the motivation for this attack. He doesn't seem to be a mental case or have any previous preoccupation with extremism or terrorism. His motivation is the question that does come up, especially when we hear over and over what a normal kid he was, before this. He just became an American citizen last November; he seems to have liked America and living an American lifestyle.
I grew up with an older half brother, 8 years older, and though I was not influenced by him, I can see where a boy child could be, especially if there was no father figure in the home and if the older brother has a very strong personality.