This is actually kind of deep. In contrast to the Christian Zionists in the evangelical movement, the World Council of Churches actually represents the mainstream of Protestants in the world.
On the other hand, the Christian Zionists still have a loud voice. For example see:
Al-Jazeera: Christian Zionists and false prophets by Daoud Kuttab
Mother Jones: Christian Zionists continue to have clout with White House
Kansas City Infozine: Christian Zionists Lobby Congress