Role reversal, extreme retaliation, fight fire with fire, do we expect anything less? What are your thoughts?

This response may be more cultural than religious. Certain places beheading is relatively common. Take a look at Mexico. A little googling will reveal many beheadings very close to home. We just don't hear about them as often.

That is inevitable.

Sad but not surprised and it Plays right into their hands for Propaganda Purposes.