I encourage you to do your own research. I could give you references to support literally any wild claim (it is the internet after all), but you need to come to your own conclusions. I know it sounds like a cop out, but I'm serious, start with the media coverage of recent terrorist incidents involving explosives and "radicalized terrorists". Then find out who was supplying the explosives and doing the radicalization.
One example local to me was a man named Schaeffer Cox who was a militia group leader who toured the country giving speeches critical of the Federal Govt. Then, a man who was being prosecuted for crimes and trying to get a reduced sentence by working as an informant for the FBI showed up to join the militia and started saying they needed to kill people and that he knew where to get hand grenades. Even though the members told him that is not what they wanted, he desperately tried to get anyone in the group to "conspire" with him to commit crimes, because if he could do that, the Feds would lighten or drop the charges against him. In a meeting with Mr. Cox to arrange transportation, this informant shows up with a box of dummy grenades provided to him by the FBI and tries to give them to Mr. Cox. He refused, but was then swarmed by agents and arrested for conspiracy to possess explosives or some bull****. His trial is going on right now.
Anyway, it follows the same pattern. Man in trouble offers to help Feds bust up a "terror cell" to get reduced charges. Feds get a hard on for freedom and democracy so they give the guy a lump of clay marked C4 to go trolling for idiots to charge with "conspiracy". Problem is, there actually aren't that many people who want to use explosives to blow stuff up, and the ones that do don't have the mental capacity to carry it out without the aid of Federal Agents. Think about it, when traffic violations drop off, what do the police do? Set up speed traps and start ticketing for anything and everything to get the numbers back up. We've got the same thing going on since now there are a plethora of federal agencies (FBI, CIA, NSA, DHS) all doing the same job, so they're competing for funding. They need to demonstrate that THEIR agency is the one out catching the evil Jihad terror muslim radical terror boogey terrror man, so that they get more funding next year.