[PhillipHer]

There are some extremist fundamentalist Christian groups that espouse a lot of this. The Nation of Islam (which isn't really Islam) moreover is quite frank about its own doctrine regarding the Jews. So it's problematic to worry about one group and not another. Has the spying activity turned up anything regarding radioactive matierials for example?

BTW the SC has already determined that such 'passive' monitoring is NOT constitutional or alllowable under the 4th ammendment, as an illegal search. The decision was written by Scalia: Kyllo v. US:

In a 5-4 opinion delivered by Justice Antonin Scalia, the Court held that "[w]here, as here, the Government uses a device that is not in general public use, to explore details of the home that would previously have been unknowable without physical intrusion, the surveillance is a 'search' and is presumptively unreasonable without a warrant." In dissent, Justice John Paul Stevens argued that the "observations were made with a fairly primitive thermal imager that gathered data exposed on the outside of [Kyllo's] home but did not invade any constitutionally protected interest in privacy," and were, thus, "information in the public domain."