>> Have you read the Coptic Gospels? The Gospel of Peter? The Gospel of Thomas? <<
Have YOU ever read the Gospel of Thomas? I have. It's an absurd joke.
>> But it took the post Nicene government authority to destroy the contrary writings. <<
They were the barbarians who burnt the libraries of Alexandria, and the Romans who the Essenes feared. And from their long-hidden treasures, what we have found are absurd (Gospel of Thomas) or vastly exculpitory of orthodox Christianity (Dead Sea Scrolls, Apostolic Constitutions, etc.). There was no "post-Nicene government authority" which destroyed the historical records; if anything, it was the pre-Nicene persecutions (which ended with Nicea) that are responsible for our meager historical record.
Kind of interesting. You assert that the authority which excommunicated Pelagius, had no authority to burn books.