I was thinking that back in the day when we looked at some of the Greek that there was a distinction between physical death and spiritual death. ( my lexicons are boxed up but I plan to exhume them someday).
Not all creatures have eternal spirits, and those creatures are not necessarily then capable of free will choosing between good and evil, and hence incapable of sinning and do not suffer a spiritual death when they expire ( which I would feebly submit might be an eternal, conscious separation from God, Gehenna, lake of fire etc.). My recollection is that the wages of sin is the spiritual form of death in the Greek text.
That might change the picture you describe, but I certainly agree there is quite a bit of mystery with respect to giants, “sons of God”, behemoth and so on. I don’t think this is all that germane to our salvation but it does lead to an interesting study as to whether or not Jesus died spiritually or physically in payment for our sins.
I appreciate your thoughts and response.
This would also raise the issue that if the death in those verses are speaking of spiritual death only then why did Jesus have to die the very physical death on the cross when He could have just gone through spiritual death? This again would call into question the character of God.
The whole of scripture points to physical death being part of the process set into motion at the fall.
Genesis 3:21 Unto Adam also and to his wife did the Lord God make coats of skins, and clothed them.
The first record in scripture that anything had died (needed the skins)
Hebrews 9:22 And almost all things are by the law purged with blood; and without shedding of blood is no remission.
Hebrews 9:27-28 And as it is appointed unto men once to die, but after this the judgment: So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.