NEW YORK: The anti-migrant sentiment taking hold in a slew of nations facing an influx of refugees is disturbing, dangerous and puts people's lives at risk, said the head of the International Organization for Migration . Concern and suspicion about migrants is based on stereotypes, fear of national identity loss and a "post-9/11 security syndrome," said William Lacy Swing, director general of the Geneva-based intergovernmental IOM.