So, this is silly, isn't it? If you accept Jude in the canon, you must also accept Enoch, and then revel in the magic and high fantasy therein.
Here's watchtower's (and I believe other fundamentalist's) work-around for that one:
Just because it LOOKS like Jude is citing the book of Enoch, doesn't mean it is. There could be another source that both Jude and the Book of Enoch are both citing separately.
Here we go:
https://www.christiancourier.com/articles/562-did-jude-quote-from-the-book-of-enoch