Those are some good points. Especially the section I bolded. People get wrapped around the axle pretty easy on pre-detestation and such.
Being raised up a hard-wound Calvinist, I know that to be true... And it is the bane of Calvinism, IMHO. I have since come to a more inclusive rather than exclusive point of view. We easily forget it is all about saving the sons of Adam.
God also traces spiritual lineage as well as physical. Jesus told the Pharisees "ye are of your father the devil"
Again, too long an argument for this sidebar, but I see no difference in the two... Perhaps hard to grasp, but I think the spiritual is more 'real' than the physical - of a higher quality. A greater set as viewed from the subset which we can now observe.
In the mean time, with our 'faith' so stubbornly couched in an ethereal, misty sense of 'spiritual', so easily allegorically surmised, we fail to see the raw, 'greater than physical' truth that is in the literal words:
There IS a seed whose head will be crushed. There is a 'they' who will 'mingle themselves with the seed of men' as per Daniel - By definition, 'they' are distinct from men, necessarily... Literally.
In a strictly legal sense it can be said that we are all sons of the devil, I suppose - That our entrance back into the House of YHWH is by adoption alone... But it does not negate the very real thing that Herod was of Edom - an Idumean - and that Caiaphas was likely Idumean (appointed high priest, and not of the lineage of Aaron) - There is something in that, just beyond what one can put a finger on.
Edom was physically present and legally responsible in the railroaded conviction of Yeshua. These, no doubt, were a physical manifestation of the doom against Edom. These ARE Edom, by blood and by spirit, BOTH.
No doubt such as these are who the prophets spoke about. Does that mean that anyone who carries the physical seed is likewise? I should hope not. But the seed who's head will be crushed came up through Edom, and actively so.