Heresy? I dunno. I buy the legend, at least. I have, ever since I was a kid. In my younger days, I was a Bible-thumping Protestant, and so of course, everything in the Bible was literal and true.
It still is.
My old ways of considering the Bible have not gone away. I still take Genesis quite literally, including Genesis 6:4.
I'll give you several verses in the same chapter proceeding that one that you can interpret just as literally and erroneously...
5.And God seeing that the wickedness of men was great on the earth, and that all the thought of their heart was bent upon evil at all times,
6. It repented Him that He had made man on the earth. And being touched inwardly with sorrow of heart,
7. He said: I will destroy man, whom I have created, from the face of the earth, from man even to beasts from the creeping thing even to the fowls of the air, for it repenteth Me that I have made them.
We know God can have no regret for anything He does, as if He were capable of making mistakes etc., but a person could easily come to believe that by interpreting these verses literally.
Perhaps this is the old sola scriptura in me, as I am having difficulty grasping something.
If what you are saying is true, that those verses do not mean what they say, then why are they there in the first place?
They are there to be transmitted and interpreted by the Church, not the common man.
The common belief held is that the "sons of God" is an expression in reference to Adams children who remained faithful to the True God and lived apart from Cain's paganized tribe, the women of which are referred to as the "daughters of men".
One people are "of God" because they followed His precepts (at least to some extent), and the other are "of Men" because they indulged their fallen inclinations so far as to remove God from their thoughts and embrace paganism.
The "sons of God"
took wives .... meaning THEY GOT MARRIED. It couldn't have been a demonic one night stand like some people are fantasizing.
What happened here is men born into the True Faith, at that time, let themselves be seduced by women who were devil worshipers (in addition to being hot), disregarded their parent's wisdom, and married them. Daddy's lax in his faith, mommy worships a serpent and has few or no morals... guess how their kids turned out?
How hard is it that natural interpretation to believe?
There is nothing at all written that suggests that the "sons of God" were fallen angels in human form (in the DR version anyway).