Top U.S. Terrorist Group: the FBI
A careful study of the FBI's own data on terrorism in the United States, reported in Trevor Aaronson's book The Terror Factory, finds one organization leading all others in creating terrorist plots in the United States: the FBI.
Imagine an incompetent bureaucrat. Now imagine a corrupt one. Now imagine both combined. You're starting to get at the image I take away of some of the FBI agents' actions recounted in this book. Now imagine someone both dumb enough to be manipulated by one of those bureaucrats and hopelessly criminal, often sociopathic, and generally at the mercy of the criminal or immigration courts.
Now you're down to the level of the FBI informant, of which we the Sacred-Taxpayers-Who-Shall-Defund-Our-Own-Retirement employ some 15,000 now, dramatically more than ever before. And we pay them very well.