Story highlights Donald Trump said Wednesday that he would kill the families of terrorists to win the war against ISIS

Trump said that the U.S. is being too "politically correct" in its fight against ISIS

Washington (CNN) Donald Trump said Wednesday that he would kill the families of terrorists in order to win the fight against ISIS.

The billionaire businessman was asked by the hosts of Fox News' "Fox and Friends" how to fight ISIS but also minimize civilian causalities when terrorists often use human shields.

"The other thing with the terrorists is you have to take out their families, when you get these terrorists, you have to take out their families. They care about their lives, don't kid yourself. When they say they don't care about their lives, you have to take out their families," Trump said.

Trump said he would "knock the hell out of" ISIS, and criticized the U.S. for "fighting a very politically correct war."