Gal 2:8 for He working in Peter to the apostleship of the circumcision also worked in me to the nations.
It's possible that Peter went to Rome. I don't believe it, but it is possible and I will cede the point. My point is that Rome was Paul's turf. Peter was an uneducated, Jewish fisherman. Paul was a Roman citizen that was so educated we are still trying to figure out what he was talking about. If Peter went there, wouldn't there have been mention of it since he and Paul apparently bickered every other time they got together?
One theme that is very hard to ignore is how much of a stubborn Jew Peter was. Peter did not like Gentiles. Even after having two visions and witnessing the Holy Spirit falling on Gentiles, this guy had to get rebuked by a mere mortal named Paul. God knew this, since He knows everything, and I find it incredibly unlikely that God would send someone as racist as David Duke to Compton to evangelize.
I understand the points you have been making, and it is perfectly fine that you don't believe Peter ever went to Rome. I do, based on the preponderance of evidence outside of scripture. My only point has been that scripture doesn't prove it one way or the other.
Thanks for the discussion.