On "The Five" today, Greg Gutfeld suggested that the growing threat of ISIS might actually represent the death knell of radical Islam, as previously disunited, uninvolved groups like the Kurds and the Saudis are spurred to take action against ISIS' horrific brutality.

“It’s the 'crazy person on a train theory,' forcing all other passengers finally to act as one,” he explained.

Gutfeld said that the U.S. is the only force on the planet that can galvanize an unruly world against ISIS.

"We are the doctor with the antidote, and if we don't give it, there will just be more disease."

If ISIS is "junior varsity" – as President Obama infamously declared – then they shouldn’t be a problem to deal with, Gutfeld argued. If they’re actually "varsity," then our response is more urgent.

“We lack the luxury to decide when and when not to fight evil. Evil has no timetable.”

He pointed to the horrific video of American journalist James Foley being graphically beheaded at the hands of an ISIS terrorist and declared that strong words, hugs or diplomacy will not work against ISIS.

Only the U.S. military will, according to Gutfeld, because, “Given the opportunity, they will show the world why evil is no match for good.”

Above, watch Gutfeld's monologue and hear the hosts of “The Five” react.

More Greg Gutfeld monologues:

Gutfeld: ISIS Is a 'Glorious Roach Motel'

Gutfeld: Replace Shark Week with 'Terror Week'

Gutfeld on How to Deal with ISIS: 'Death Is the Only Language Evil Understands'