Boston Marathon bombing is the US fault?

I came across this last week:

A United Nations official known for blaming the U.S. for unrest in the Middle East has angered critics again by blaming the Boston Marathon bombings on “American global domination.”

"The American global domination project is bound to generate all kinds of resistance in the post-colonial world," Richard Falk, the UN Human Rights Council's Palestine monitor, wrote in an article for Foreign Policy Journal titled, “A Commentary on the Marathon Murders."

"It is soon to tell, and the somewhat hysterical Boston dragnet for the remaining at large and alive suspect does suggest that the wounds of 9/11 are far from healed," he wrote. "We should be asking ourselves at this moment, 'How many canaries will have to die before we awaken from our geopolitical fantasy of global domination?'”

Is the U.S. really to blame for their citizens being killed like this fellow at the U.N. says? What do you think? I know what I think.