Hyam Macoby, Reovlution In Judaea."
Except John the Disciple wrote the book of John, before Paul got going good.
Nope. Paul's epistles are actually the earliest canonical Christian writings, dating to the 50's C.E. The gospel of John is generally dated around 90-100 C.E.
If you mean the Gospel, 'twas another, later John. More knowledgeable of Judaism, though yet a Hellenist. And if you mean I, II or III John, 'twere others still.