​Schieffer on ISIS: America has no choice now

So this is how it is going to be -- another unspeakable act staged on video for all the world to see, and it is addressed to those who side with us.

I hope you will never have to look at this video, but understand what has happened here: This British victim, like the two American journalists who were executed, was not a combatant. He was an aid worker who went to Syria to help war victims.

What kind of people kill the innocent in the hope of impressing their enemies?

These kind of people: barbarians, psychopaths.

And who are they trying to impress? The video's title page leaves no doubt: It says, "A message to the allies of America."

A narrator says the British aid worker is being executed not for anything he did, but because "British Prime Ministers can't find the courage to say no to the Americans."

There are still those who say all this has nothing to do with America, that ISIS does not really pose a threat to us.

Sadly, ISIS does not seem to see it that way -- and these videos make it clear.

Yes, America is weary of war, but when fires break out, we fight them before they spread, not when it is convenient.

We have no choice now. Whatever it takes -- and as the president said, however long it takes -- this evil must be eradicated. These forces must be destroyed.