Because of one mention, that of Jude quoting a prophecy credited to Enoch, there is this support for believing in what is found known as the Book of Enoch.
In verses 14 and 15 of the epistle of Jude, he said:
Enoch, the seventh from Adam, prophesied, saying, “Behold, the Lord came with ten thousands of his holy ones, to execute judgment on all, and to convict all the ungodly of all their works of ungodliness which they have done in an ungodly way, and of all the hard things which ungodly sinners have spoken against him.”
All sorts of things come to be believed based on an understanding of one mention of something in scriptures. This is not good witness for a teaching from scriptures.
We have hardly anything for certainty that a Book of Enoch we have available now (there are different ones) is the same as what Jude had the prophecy of Enoch from. Jude did not even say it was from a book. There was this prophecy in common, and any other things that are not said in the scriptures of the Bible, and there are a great many of such teachings, were likely added in a composed book named as the Book of Enoch, later than any of the old testament books of the Bible. What we have available for it does not/do not qualify as scripture, with so much questionable about it.
There is not basis then for claiming with use of a Book of Enoch that angels were actually mating with humans.
If there is the claimed flatness of our earth, how do those with a model of such a shape of the earth explain this?
I found this Youtube video was posted elsewhere in CF.