And the down side would be?????
the head would fall down of course. I hope children over a certain age can go. we need to toughen up these European and American kids. I saw a floating corpse in Bay Ridge in the ocean when I was about 9. It wasn’t the end of the world.
I’ll presume he means that ones they CAPTURE....
Now, as to ‘what’s wrong’: it does nothing to deter the crime(s).
What we/they SHOULD do is, upon reclamation of a body (suicide/battlefield/etc.) or after execution, bury them on a pig farm after pumping their heads/guts full of pork fat.
It is less painful than execution by Firing squad, electrocution, hanging, or lethal injection. It is why it was invented....to shorten the “discomfort.” Frankly, if we are going to go back in history, why not bring back “Drawn and Quartered.” THAT would be fitting for terrorists.
By the way, the last guillotined person was executed in the 1970’s. Not that long ago.