Washington: A game-style website about extremism designed by the FBI to help teachers and students spot and prevent radicalisation of youth has hit trouble before it is even launched, with Muslim and Arab advocacy groups who were briefed by the agency saying they fear it will foment discrimination against Muslims. Some members of the handful of Muslim and Arab advocacy groups said the program, which they believe to be the first aimed at the nation's schools, frames violent extremism heavily through the lens of Islam and that they had complained strongly.