How do you figure Peter the Roman will be Satan? What sort of anti-Catholic hate drives that expectation? The prophecy suggests tjust the opposite: that he will feed his flock amid many tribulations, a precise echoing of the establishment of the Papacy in the gospel of John: Peter, feed my lambs.
Separate what your source has written from what Malachy actually says:
"the final persecution of the Holy Roman Church there will reign Petrus Romanus, who will feed his flock amid many tribulations; after which the seven-hilled city will be destroyed and the dreadful Judge will judge the people. "
Now, here's what you have added to it:
"This final Pope will likely be Satan, taking the form of a man named Peter who will gain a worldwide allegiance and adoration. He will be the final antichrist which prophecy students have long foretold. If it were possible, even the very elect would be deceived. "
Will he be universally adored? ABSOLUTELY NOT! Malachy says he givern his church during a great persection!
Will he be Satan: ABSOLUTELY NOT! He will feed his flock (a Eucharistic reference) during their suffering!
Sounds like some rabid foaming at-the-mouth hate mongerer has perverted the prophecy, turning it on its head, to preach hatred.
Sounds like Tim LaHaye's (spit!) theory. In his abominably bad Left Behind books, he makes the Tribulational pope named Peter, and aligned with Anti-christ.
His basis for this is half Malachi Martin and half Dave Hunt's bastardization of Revelation 17. LaHaye's acolytes will have a field day with this one.