Just the sort of thing an evil demon would come up with to mock believers.
Of course it's a deliberate fake by a charlatan.
Like you mocking something you know little about?
Fools rush in where angels fear to tread. Go ask the Italian and international medical teams many of whom were atheists who attested to this phenomenon. Other saints like St. Theresa of Avila and St. Francis Assisi experienced the same wounds of the Christ.
You contradict yourself. If it's a demonic miracle then it's not a fake by a charlatan. It's either supernatural or it's a man-made fake. Can't be both.
The amount of evidence supporting the truth of St. Pio's stigmata, as well and the testimony of miracles related to Pio, is so overwhelming as to be undeniable to all but the ignorant and willfully blind. 
It was not a deliberate fake. Padre Pio was inflicted by not only stigmata to his hands, but lacerations in his side and feet, none of which, over the years, were ever infected. He was examined by more than one physician. His wounds were real. You should look up the instances of stigmata before you post such an opinion.
It was not fake. Of course, ignorant people who know nothing about it, and who lean toward foam-at-the-mouth bigotry will probably say otherwise.