I could speculate that since it was tax day and Patriot’s Day, that it was some domestic terrorist in a “patriot” movement. If that is the case, you don’t forward your cause of freedom and a return to a Constitutionalist government by killing an 8 year old boy. In fact, all you do is give the government another reason to tighten the screws every time you do these things, and in the process, you killed an 8 year old boy, you scum.
I could speculate that it was Islamic terrorism. If that is the case, you don’t glorify your god by killing 8 year old boys. You merely taint him with your actions, and if he is truly good and just, he despises you for what you did yesterday.
You see, it doesn't matter what the cause is. Your beef is with someone other than the people that you killed, and that means that you are doing it wrong.