Csilla Boross as Abigaille and Franco Vassallo as Nabucco (Nebuchadnezzar II) in the Washington National Opera's production of "Nabucco." Its plot includes religious fundamentalism, nation-building, Middle East conflict and genocide. (Photograph provided by Washington National Opera)

Csilla Boross as Abigaille and Franco Vassallo as Nabucco (Nebuchadnezzar II) in the Washington National Opera's production of "Nabucco." Its plot includes religious fundamentalism, nation-building, Middle East conflict and genocide. (Photograph provided by Washington National Opera)