If

If you can keep your head when all about you   
    Are losing theirs and blaming it on you
-- Kipling, "If"

You can find the snuff video on the internet if you want. I won't post it. But it's out there. James Foley, a freelance journalist who was captured in 2012, was beheaded by some guy in a black hood, a guy who wanted to send a message.

We've got the message, pal.

As it will be in the future, it was at the birth of Man—
There are only four things certain since Social Progress began —
That the Dog returns to his Vomit and the Sow returns to her Mire,
And the burnt Fool’s bandaged finger goes wabbling back to the Fire—

And that after this is accomplished, and the brave new world begins
When all men are paid for existing and no man must pay for his sins
As surely as Water will wet us, as surely as Fire will burn
The Gods of the Copybook Headings with terror and slaughter return!
-- Kipling, "The Gods of the Copybook Headings"

Not much changes, really.