Ivan Eland has a new book out entitled "The empire Has No Clothes: U.S. Foreign Policy Exposed". (I had never heard of the guy before picking up this book from the new book shelf at the public library.)
Eland, a Ph.D. in national security policy from George Washington, argues that, like a rose by any name, the U.S. has an empire. This state of affairs is especially evident in our continuing global engagement even after the end of the Cold War.
It is an interventionist foreign policy, especially in the Middle East, in support of our informal, global empire that makes the US the disproportionate object of "blowback terrorism." Blaming our political and economic freedoms or our culture for blowback terrorism obscures this.
He further argues that we do not need this empire and that maintaining it has corrosive economic, political, and social consequences here at home.