Beginning with the word of Allah, we find:
When you meet the unbelievers, smite their necks, then, when you have made wide slaughter among them, tie fast the bonds; then set them free, either by grace or ransom, till the war lays down its loads. Surah 47:4-5, Arberry translation.
I wonder how many more “heads will roll” 
before we see the root of Islam? Two links for you to look at. First, from my friend, Dr. Tim Furnish, who gives us the technical and historical background of beheadings in Islam. Then a look-back at an article I posted sometime back related to the subject:
Dr. Tim Furnish – Beheadings in Islam
Finally, from the Word of God, Yahweh, the God of Abraham, Isaac, and Jacob, and His only begotten One, the Christ — the only true Word:
Revelation 20:4 (NASB) 4 Then I saw thrones, and they sat on them, and judgment was given to them. And I saw the souls of those who had been beheaded because of their testimony of Jesus and because of the word of God, and those who had not worshiped the beast or his image, and had not received the mark on their forehead and on their hand; and they came to life and reigned with Christ for a thousand years.
Ever wonder why the flags of so many Muslim countries are decorated with a sword?
Jesus come quickly!
Jack
Interesting when I just read this:
http://www.theblaze.com/stories/2013/06/30/catholic-priest-beheaded-in-syria-by-al-qaeda-linked-rebels-as-men-and-children-take-pictures-and-cheer/