Monte Kim Miller formed a group known as the Concerned Christians in Colorado, during the 1980s. Created to combat New Age religious movements and anti-Christian sentiment, it has shifted to more of an apocalyptic Christian movement as the group adopted the less mainstream views of the millennium held by Miller.
Between 60 and 80 members of the group disappeared from their homes and jobs in Colorado in October 1998 and were the subject of a search. On January 3, 1999, they gained notoriety when they were arrested and deported from Israel as part of an Israeli effort to protect the Al-Aqsa mosque from extremist Christian groups, codenamed "Operation Walk on Water". According to Israeli police, the Concerned Christians were one of several independent groups who believed it must be destroyed to facilitate the return of Jesus Christ. The group members said that they were law-abiding religious pilgrims there to await the return of Jesus but had no plans to participate in any illegal activity.
- B.A. Robinson (2002-02-20). "The "Concerned Christians" Cult – Originally of Denver CO". Ontario Consultants on Religious Tolerance. Retrieved 2008-05-28.
- "Cult members deported from Israel". BBC. 1999-01-09. Retrieved 2008-05-28.
- "Apocalyptic Christians detained in Israel for alleged violence plot". CNN. 1999-01-03. Archived from the original on July 18, 2007. Retrieved 2008-05-28.