[NYT] The F.B.I. is about to introduce an interactive program it developed for teachers and students, aimed at training them to prevent young people from being drawn into violent extremism. But Muslim, Arab and other religious and civil rights leaders who were invited to preview the program have raised strong objections, saying it focuses almost entirely on Islamic extremism, which they say has not been a factor in the epidemic of school shootings and attacks in the United States.The program, according to those who saw it at F.B.I. headquarters, called "Don't Be a Puppet," leads the viewer through a series of games and tips intended to teach how to identify someone who may be falling prey to radical extremists. With each successful answer, scissors cut a puppet's string, until the puppet is free.