'Syrian refugees are rabid dogs'

US Republican presidential hopeful Ben Carson on Thursday compared refugees fleeing Syria's civil war and Islamic State extremists to rabid dogs. Carson, a top contender in his party's 2016 race for the White House, made the remarks at a campaign stop in the southern US state of Alabama. "We must balance safety against being a humanitarian," Carson said as he talked about admitting Syrian refugees into the United States. "If there's a rabid dog running around your neighborhood, you're probably not going to assume something good about that dog. And you are probably going to get your children out of the way. Doesn't mean you hate all dogs, by any stretch of the imagination," he said. Meanwhile, Donald Trump has confirmed his plan to force Muslims in the United States to register on a database - and refused to respond to comparisons between his policy and the treatment of Jewish people in Nazi Germany. A NBC reporter asked whether all Muslims in the US would be forced to register. "They have to be," replied Trump. "They have to be."