...or someone in Country X’s embassy decided that this guy was more likely to be a nut or an agent provocateur than someone in a position to offer really useful

...or someone in Country X’s embassy decided that this guy was more likely to be a nut or an agent provocateur than someone in a position to offer really useful intelligence, and therefore there was no downside to turning the fellow in to the FBI. He should have gone to the Russians. I hear their spying-on-America department is a little understaffed these days.