1. The Gospels are witness accounts. They tell of events later generations could not have known.
2. Coptic translations have been found in Egypt. Dated 50 A.D. at the latest. Every generation has different calligraphy.
All you succeed to do is to repeat the mantra of semiliterate theologians. I have heard your mantra for fifty years now.
Do not be tedious. Surprise me and come out with something I have not yet heard.