There is no proof that Peter was even in Rome let alone crucified upside down there on an upside down cross...
There is however evidence that an upside down cross is Pagan, or Satanic...
Just because you repeat what you've been told doesn't make it true...
“There is no proof that Peter was even in Rome”
There is a clear record of Peter being in Rome. St. Clement of Rome alludes to it in 90-95 AD in his letter to the Church at Corinth. St. Ignatius writings in circa 107 AD clearly indicates that Peter and Paul were both in Rome. St. Irenaeus of Lyon writing circa 170-175 AD also attests that St. Peter and Paul were in Rome. Tertullian, writing while still an orthodox Catholic mentions it.
And just because you post lies does not make you a liar. Now the choice that C.S. Lewis gave when arguing the divinity of Christ was that Christ was either Lord, lunatic or liar. Let us use the same choice for those who post lies in RF. Certainly you can not be liars, moderators tell us that this is never the case. I would never call you Lord (I am sure you can understand that). This leaves only one choice left, lunatic.
That is after all the best choice as it allows the claim of innocent misconceptions to remain.