A favorite podcast of mine for several years now has been Dan Carlin's Hardcore History. Dan has a real gift for storytelling, and is a serious and humble student of history.
A recent episode (which I still haven't finished) deals with events that transpired in the German city of Muenster in the early 1500s, events specifically related to the rise of Protestantism and a millenial-apocalyptic fervor (with date setting and everything) that gripped a good chunk of the very, very religious populace, particularly the Anabaptists.
The JW parallels are obvious, as you will discover if you decide to give it a listen.
http://www.dancarlin.com//disp.php/hharchive/Show-48---Prophets-of-Doom/Luther-Reformation-history