Since its opening in 1957, the Islamic Center of Washington has been the city’s most prominent mosque—a center of worship for thousands of area Muslims, including many members of the capital’s diplomatic corps. President Bush even made a speech at the mosque earlier this summer. But now the Islamic Center has become immersed in a nasty court battle marked by charges of embezzlement, abuse of women and an alleged attempt to spread radical messages of hate. The fireworks began earlier this year when federal prosecutors filed a criminal complaint against the recently ousted business manager of the mosque, Farzad Darui....