We can all agree that what happened at the marathon is unacceptable in the 21st Century, but I think we can just as easily agree that how we react to such events is just as important as the events themselves.
Emotions are high right now. We are angry. "Who would do such a senseless act?" We want answers. We want to direct our anger at someone. For all Americans, it made sense that there was a Saudi person of interest, albeit for a short period of time.