People who think that Padre Pio was a saint ignore the fact that he was subject to the heretical VII antipopes. And they fail to realize that what may appear to be a miracle can indeed be a deception.
Bad books will abound upon the earth ; and the spirit of darkness shall spread over the earth a universal relaxation about everything relating to the service of God. Satan shall have very great power over nature
Vatican II, among other things, which Pio was subject to.
(God's punishment for the crimes of men)*; temples will be erected for the worship of these demons. Some persons shall be transported from one place to another by these wicked spirits, even some priests, because these will not be animated by the holy spirit of the gospel, which is a spirit of humility, charity, and zeal for the glory of God.
And there are examples of people being deceived by such 'miracles' and 'saints' in the history of the Church:
More to our purpose are a number of feigned or deluded ecstaticas who often traded upon the popular credulity in countries like Spain that were ready to welcome the miraculous.
Amongst the most famous of these was Magdalena de la Cruz (1487-1560), a Franciscan nun of Cordova, who for many years was honoured as a saint. She was believed to have the stigmata and to take no other food than the Holy Eucharist.
The Blessed Sacrament was said to fly to her tongue from the hand of the priest who was giving Holy Communion, and it seemed at such moments that she was raised from the ground. The same miraculous levitation took place during her ecstasies at which time also she was radiant with supernatural light.
So universal was the popular veneration, that ladies of the highest rank, when about to be confined, sent to her the cradles or garments prepared for the expected child, that she might bless them. This was done by the Empress Isabel, in 1527, before the birth of Philip II.
On the other hand St. Ignatius Loyola had always regarded her with suspicion. Falling dangerously ill in 1543, Magdalena confessed to a long career of hypocrisy, ascribing most of the marvels to the action of demons by which she was possessed, but maintaining their reality.
She was sentenced by the Inquisition, in an auto-da-fé at Cordova, in 1546, to perpetual imprisonment in a convent of her order, and there she is believed to have ended her days most piously amid marks of the sincerest repentance (see Görres, "Mystik", V, 168-174; Lea, "Chapters from Relig. Hist. of Spain", 330-335).
A person who had seemed so pious that she was universally honoured as a saint, and even St. Ignatius, though suspicious, did not venture to denounce her for the fraud she was.
Why should anyone doubt that this may have been the case with Pio? Indeed a Catholic saint would exhort people to get out of the false 'church' but he did not do any such thing.