Rosenberg says:
They [Iran's leaders] are driven by a dangerous, virulent, apocalyptic Shia eschatology or End Times theology that few intelligence officials or analysts in the West understand or take seriously. As such, while Iran’s leaders are rational within their own world view, this doesn’t make them less dangerous; it makes them more dangerous . . . It is precisely because of their rational but deeply misguided religious beliefs that Iran’s leaders are actually much more likely than other world leaders to use nuclear weapons to accomplish their apocalyptic, genocidal End Times beliefs and objectives. The danger is that few Western analysts are listening carefully to what Iran’s leaders are saying about their eschatology or drawing proper conclusions about the dangerous implications of those beliefs.
Read Rosenberg's whole post for much more...