Genesis 6:1-4a
Those who have commented about this passage have been everyone from new Bible believers to well-seasoned saints who are masters of the Hebrew language.
The first is view, may I call it the wooden literal or "angelic" view?
Second would be the figurative, or "human" or, "unequally yoked" view.
Third, a compromise view. I feel that is what is called for here.
The first view concerning this passage is the wooden literal or "angelic" view. This is the view that the “sons of God” are angelic beings. Since they certainly would not be any of the holy angels, that is, those that remain faithful to God and serve Him, these would have to be fallen angels, those who joined Lucifer (Satan) in his rebellion against God.
The case for this view is that some commentators say that the Hebrew construct here is such that it cannot mean anything else. The title “Sons of God” in the Old Testament is only given to direct-created beings (angels), not to anyone born of natural means. In the Old Testament, God never refers to the Old Testament saints as “Sons of God”. Abraham-servant; Moses-servant, David (etc.,)-servant. Also, if you should seek the literal since first, this is the most literal interpretation.
The case against centers around the question: Are fallen angelic beings capable of doing this? Do they have, within themselves the ability that us men have: to introduce into women (I am trying to say this in a suitable way) the child’s father’s seed? Or, do they possess the woman’s womb and cause, by some other means, the impregnation and supply the father’s half of the genetics? The Lord Jesus, in answer to the Sadducees, did say that those who are in heaven neither marry nor are given in marriage. But, does this mean that they are totally incapable of reproduction with women?
My view: there are wide gaps in God’s creation that cannot be bridged. These are gaps that naturalists cannot deny. 1.)How was that there was once nothing and then there was something? 2.)How was it that once everything was dead and then there was something living? And; 3.)How do you get from one species to another? I mean today you cannot breed, let's say a dog with a cat! So, can it possibly be that non-corporal beings (these fallen angels), spirit beings, produce children with these women? It would seem that this is an unsatisfactory explanation. (Gen. 6:1-4)