Bombing Motivations

So the motivation of the bombers is what everyone pretty much guessed as soon as they heard there was a bombing: They were motivated by their religion of Islam. But it’s not nice to jump to conclusion, so we have to act all surprised.
Give me a sec…
But most Muslims are such nice people! How could this happen? Did we fail them somehow? Maybe it’s our fault for what our military has done to those countries overseas; they were so peaceful and nice before we got involved! Really, the Tsarnaev’s are the true victims here! Why did this have to happen?! Why?! Maybe if we change our ways, less people will fall victim to wanting to mercilessly blow up children.
Okay, I’m done. You have to wonder what the logic was here:
1. Blow up children proving you’re ruthless murderers who can’t be reasoned with
2. ??
3. Islam dominates the world
People wonder if these two were part of some larger conspiracy. It seems too stupid and pointless to be much larger, but of course I never got exactly what sensible thing 9/11 was supposed to achieve either.
And I know the left are going to want us all to learn something from immigrants turning against us, but are Muslims going to have some deep conversations about why if you hear an explosion, you can think “Muslim!” and usually be right? Anyone working on a solution to fix that?
And are we waterboarding Dzhokhar? I mean, I know we probably got all the information we needed out of him, but maybe he can work as a practice dummy for CIA agents who need more waterboarding training.