have done so much damage to Christianity.
ON Edit:
http://www.pbs.org/now/politics/czionism.htmlDispensationalism:
Most Christian Zionists subscribe to Dispensational Premillennism, a theological approach that claims that "God relates to human beings via different covenants ("dispensations"); in particular, dispensationalists believe that God's covenant with Israel, including promises of land, continues in full force distinctive from Christianity." (Donald Wagner, SOJOURNER, July-August 2003)
Paul Beran, lecturer at Northeastern University, explains that "in dispensationalism, history is an evolving pre-ordained plan that has certain marking points." Each of these seven dispensations represents one of God's tests for man on the path toward Christian salvation.
When Israeli statehood was declared in 1948, dispensationalists considered it an important prophetic event, or as Arno C. Gaebelein, editor of OUR HOPE described it, "the sign of all signs."
Central to dispensationalism is the belief that all Israel will be saved; as theologist Stephen Sizer puts it, it is the belief "that the boundaries of the land promised to Abraham and his descendants will be literally instituted; and that Jesus Christ will return to a literal and theocratic Jewish kingdom centered on Jerusalem."
Premillenial dispensationalists believe that Christ will return prior to the millennium (or 1,000 year reign) begins. There are also post-millennialists who believe that Christ will come after the 1,000 years and amillennialists who believe that God's promises are figurative and will not be literally fulfilled.
Rapture:
This concept is from a literal interpretation of 1 Thessalonians 4:16-17 in which Paul says, "For the Lord himself, with a word of command, with the voice of an archangel and the trumpet of God, will come down from heaven, and the dead in Christ will rise first. Then we who are alive, who are left, will be caught up together with them in the clouds to meet the Lord in the air. Thus we shall always be with the Lord."
Rapture is the notion that in the last days believing Christians will be removed from the earth; it is literally explained as the time when Jesus calls the faithful to heaven and believers are physically taken up.
Further information
http://www.pbs.org/wgbh/pages/frontline/shows/apocalypse/explanation/