Peter did indeed go to Rome. Where, out of curiosity, did you read this narrative of Simon Magus impersonating Peter?
No where in the bible is Peter ever said to be in Rome. Paul lists who all he was in contact with in Rome, you think he would have mentioned Peter! Explain to me how Milik could have been mistaken about Peter's ossuary being in Jerusalem.
Where, out of curiosity, did you read this narrative of Simon Magus impersonating Peter?
Do a search on Justin Martyr.