Saudi government funded jihad teaching in US mosques, by Robert Spencer.

Four separate studies since 1999 all found that 80% of U.S. mosques were teaching jihad, Islamic supremacism, and hatred and contempt for Jews and Christians. There are no countervailing studies that challenge these results. … That means that around 1,700 mosques in the U.S. are preaching hatred of infidels and justifying violence against them.

hat-tip Stephen Neil