Screening millions of visa applicants every year for anti-Semitic conduct isn't practical, according to Australia's head of immigration.Clare Sharp told the Royal Commission into anti-Semitism and Social Cohesion that the department processes around nine million visas annually and relies on a risk-based approach to determine who needs to be screened.Individuals who raise concerns are added to a ''central movement alert list'' before they apply for a visa to give the department a head-start.This opens the door to a review of an individual's social media presence, which Ms Sharp said involved considering an individual's social media presence including liking content or...