Republican presidential candidate Ben Carson speaks during a town hall event at River Woods September 30, 2015 in Exeter, New Hampshire

*(Via MSN News) – Republican presidential candidate Ben Carson on Thursday used an extended metaphor about rabid dogs to discuss efforts to vet refugees fleeing the bloody civil war in Syria.

While speaking at a campaign event in Mobile, Alabama, Carson compared the need to screen refugees before they enter the U.S. with the steps a community would take to protect children from rabid dogs.

“If there is a rabid dog running around your neighborhood, you’re probably not going to assume something good about that dog. And you’re probably going to put your children out of the way,” Carson said. “Doesn’t mean that you hate all dogs, by any stretch of the imagination. But, you’re putting your intellect into motion and you’re thinking, how do I protect my children?”

“By the same token, we have to have in place screening mechanisms that allow us to determine who the mad dogs are, quite frankly,” Carson continued. “Who are the people who want to come in here and hurt us and want to destroy us? Until we know how to do that, just like it would be foolish to put your child out into the neighborhood knowing that that was going on, it is foolish for us to accept people if we cannot have the appropriate type of screening.”

Get the rest of this HuffPost story at MSN News.