I'm grateful for the edification, but dude, that's a very specific reference from a >$100 (text?)book on a very particular subject. I'm afraid to ask about your background :P
I don't know anything about nerve gas, but do know about a couple topics that I suspect would trigger the same people, and it creeps me out that people become suspicious about someone for simply knowing something.
Probably worth keeping in mind that not a few people put cryptography in the same "military secrets" bucket.
It's one of the reasons I leave this site every day feeling wonderfully inadequate :)