Washington, D.C. ? A former Bush aide claims that evangelical Christians were embraced for political gain at the White House but derided privately as “nuts,” “ridiculous” and “goofy.”

The allegations – denied by the White House on Friday – are in a new book by David Kuo, a conservative Christian who was deputy director of President Bush’s Office of Faith-Based and Community Initiatives until 2003.

The book describes Kuo’s frustration at what he felt was lackluster enthusiasm in the White House for the program, which seeks to steer more federal social service contracts to religious organizations. Details from the book, “Tempting Faith: An Inside Story of Political Seduction,” were reported by MSNBC ahead of Monday’s publication date.

Kuo singled out staffers in the office of Karl Rove, Bush’s top political adviser and deputy chief of staff, as particularly condescending toward evangelical Christians, viewing them as necessary to help win elections but ridiculing them behind the scenes.