re: “The governor of Massachusetts says he has no idea what motivated the terrorists who exploded two bombs near the finish line of the Boston Marathon.”
He also had no idea why Hitler did what he did, nor why Stalin did what he did, or why Osama bin Laden ordered the 9/11 attack.
“Hey, they are all a mystery to me - go figure! Some people are just whacked. Now, that Timothy McVeigh guy, he was a right wing, Dittohead, terrorist extremist and we all KNOW why that nutjob, Christian, KKKer, homophobe did what he did. But, some cases are just unsolvable.” (sarc.)
What difference does it make? We have dead and wounded. Let’s just move on. —This is called the Hillary response.