Concur with your opinion about a heavily-armed populace being a major deterrence to attack by large enemy forces. Admiral Yamamoto was right on that account. We need someone to keep an eye (and ear) on any and all threats. This isn’t something that can be accomplished by using amateur radio equipment in one’s garage. It requires a lot of effort from professionals. And BTW, it was SIGINT that led to the shootdown of Yamamoto’s plan in he South Pacific.
Assuming the NSA has been storing and analyzing vast amounts of communication data, then someone high-up must know who Obama really is and to whom he gets his financial resources and directions? Maybe the same folks are controlling the NSA higher ups?