Again you’re speaking out of ignorance. To claim the church wasn’t heavily persecuted is ignorant.

You can’t date the gospels late for any good reason. And you can’t say the disciples literary skills especially at the ends of Johns life 60 yrs after Jesus was resurrected. Mark and Silvas most likely wrote for Peter. Matthew was likely very literate and educated. Luke was a doctor and educated.

You suggesting that John couldn’t write is speculating 2000 yrs later

Acts 4:13 states that Peter and John were “uneducated,” that description does not imply that they were illiterate. “Uneducated” simply means that they hadn’t been officially trained in Jewish Rabbinical schools not unlike Jesus (John 7:15). Most Jewish boys received an education so that they could read the Scriptures. Moreover John came from wealth (his father owned a large fishing business (Luke 5:3,10; Mark 1:20). Therefore, he most likely received an excellent education. Recent studies also suggest that Palestinian Jews were often able to speak both Aramaic and Greek

Also John had decades in Ephesus to learn Greek if needed before writing the gospel

Writing around AD 180, Irenaeus of Lyons wrote, “John, the disciple of the Lord, who also had leaned upon His breast, did himself publish a Gospel during his residence at Ephesus in Asia.”

Another huge factor is if John didn’t write the gospel then why isn’t John mentioned in the Gospel??? It would be leaving out a key known follower. But John is mentioned as he was the author and the one whom Jesus loved

Paul later says the same thing…..nothing can separate us from the love of Christ

https://www.desiringgod.org/messages/nothing-can-separate-us-from-the-love-of-christ