Not quite Wordsworth, is it. The British Jihadist’s poem’s title is "How To Behead":
It’s not as messy or hard as some may think.
It’s all about the flow of the wrist.
Sharpen the knife to its maximum.
And before you begin to cut the flesh.
Tilt the fool’s head to its left.
Saw the knife back and forth.
No doubt the punk will twitch and scream.
But ignore the donkey’s ass.
And continue to slice back and forth.
Take it away, Dan!
The Dish 