A video of Moroccan youths insulting a rabbi on a street in Amsterdam has prompted the Dutch justice minister to consider using undercover police wearing yarmulkes, Jewish skullcaps. The officers have been nicknamed "decoy Jews" by the press. Ernst Hirsch Ballin says similar techniques are sometimes used to lure hard-to-catch criminals, such as rapists, and could also have some use in combating crimes against gay people. Recent press reports have claimed that antisemitism is increasing in the Netherlands due to friction with the country's Muslim minority.