Not so alarming in the first place, but now we find this out:

The informer, sent to penetrate a loose group of men who liked to talk about jihad and fire guns in the woods, had come to be seen by the suspects as the person who might actually show them how an act of terror could be carried off.

Indeed, over the months that followed, as the targets of the investigation spoke with a sometimes unfocused zeal about waging holy war, the informer, one of two used in the investigation, would tell them that he could get them the sophisticated weapons they wanted. He would accompany them on surveillance missions to military installations, debating the risks, and when the men looked ready to purchase the weapons, it was the informer who seemed to be pushing the idea of buying the deadliest items, startling at least one of the suspects.

So the main instigator of Jihad was a government informer! It will be interesting to see how this unfolds in court. At least they'll have access to a court.