Why do so many Islamists choose beheading as their favoured way of killing?

In the last few years it seems as though few news reports from Syria, Iraq or other places where Islamic terrorists are wreaking havoc (or indeed on attacks on British soldiers on the streets of London or incidents of 'workplace violence' in America) are complete without mentioning that the victims were beheaded.

Why do so many Islamist terrorists choose beheading as their favoured method of killing?

Let's see...

1. Koran 5:33 'The punishment of those who wage war against Allah and His Messenger, and strive with might and main for mischief through the land is: execution, or crucifixion, or the cutting off of hands and feet from opposite sides, or exile from the land: that is their disgrace in this world, and a heavy punishment is theirs in the Hereafter.'

2. Koran 8:12 'I (Allah) will instill terror into the hearts of the unbelievers: smite ye above their necks and smite all their finger-tips off.'

3. Koran 47:4 'Therefore, when ye meet the Unbelievers (in fight), strike off their heads; at length; then when you have made wide Slaughter among them, carefully tie up the remaining captives...'

Oh I see.