...And... what is your evidence that the non-canon sources were written before Jude and not after?
Since Jude 14-15 come from the book of Enoch, then I would have to look for the oldest evidences for the book of Enoch.
As I stated before the Dead Sea Scrolls (DSS) from the Qumran caves, contained some of the oldest non-Greek Septuagint. The Book of Enoch found in cave 4, were shown to be as old as late 3rd century BCE, predating before Jesus' ministry and dead-resurrection (around 32 to 36 CE). If it predated Jesus, then it certainly predated the epistle of Jude, wouldn't you agree?
The date to Jude can't be pinpointed exactly, because the original is lost, but the most conservative scholars place between 66 CE and 90 CE. Most likely it was written between 80 and 90.
1 Enoch:
Vermes said:
Various Qumran caves have yielded for the first time the original Aramaic text of one of the major Pseudepigrapha, the Book of Enoch, which was previously known from a complete Ethiopic translation and from a Greek rendering of chapters i–xxxii and xcvii–ci, cvi–cvii, as well as from a number of Greek quotations from chapters vi to xv transmitted by the Byzantine writer George Syncellus. Qumran Cave 4 has yielded seven copies of the writing attested by, but not strictly identical to, the Ethiopic, and four further copies of the related Book of Giants, dependent on chapter vi of Enoch, fragments of which have been discovered also in 1Q and 6Q. Palaeographically, all of them are dated to between 200 BCE and the end of the pre-Christian era.
The "end of" the pre-Christian era, meaning before Jesus' birth in 6 BCE.
The
Book of Enoch (or
1 Enoch) can only be found in it complete form from the 15th-16th century, written in Ethiopic, most likely directly translated from Greek, but the fragmented scrolls (particularly in Qumran, cave 4 or
4Q) were written in Aramaic, and have been dated as early as 200 BCE (or late 3rd century bce).
The fragments in Q4, are evidences that it predated Jude, by at least 2-and-a-half centuries. Bronze coins found in the cave, have been dated to John Hyrcanus (135–104 BCE), showed further that people were placing scrolls and other items, century/centuries before Jesus was even born (most would put it to 6 BCE).
But we are not talking about Jesus, but about Jude's epistle.
There are other scrolls to Enoch, found in other caves, 1Q and 6Q, have been dated to different times, but it cave 4 or 4Q that provided the oldest find to 1 Enoch.
Look it up the Dead Sea scrolls, BilliardsBall, or are you too lazy or afraid to do a little research and look at what you might find?
Sources:
Vermes, Geza, 2012, The Complete Dead Sea Scrolls In English, 7 ed., Penguin Classics.