That's where you and the other person probably parted company. To say that there is a history of terrorist activity in the United States is plainly accurate. It goes all the way back to pre-Revolutionary days. Indians terrorized white settlers, European military terrorized the Indians and each other. The Boston massacre was an act of terrorism.
However, to say that the United States has a history of terrorism is a form of rhetoric that implies co-equality with terrorist states like Iran and Syria. It is the rhetoric used by MoveOn, Not In Our Name, and other radical leftist groups to further an argument that somehow we in the United States deserved what happened to us on 9/11 (and before).
And, as always in the fine art of rhetoric, words and the way they are used have meaning.
The term "bully pulpit" stems from President Theodore Roosevelt's reference to the White House as a "bully pulpit," meaning a terrific platform from which to persuasively advocate an agenda. Roosevelt often used the word "bully" as an adjective meaning superb/wonderful. The Bully Pulpit features news, reasoned discourse, opinion and some humor.