Humiliation of a corpse is probably a deterrent.
Okay, that does make sense.
But is it really crucifixion? When the Tudors executed people and left parts of their dead bodies hanging on spikes or fences, we don't say that they were impaled.
Er, ... anybody else feel uncomfortable talking about this?
Beheading then crucifying doesn't make much sense.Humiliation of a corpse is probably a deterrent.
Humiliation of the corpse is an ancient tradition in the area. When you read in the Old Testament that someone was "hanged", it meant that his already executed body was put on public display.
"Cursed be everyone who hangs on a tree."