Hey wait a minute...
Isn't there an old WT teaching that (at least part of) the "sacrifice" that Jesus made was that he could have fathered a race of perfect human children, had he married. I.e., the WT teaching is that only one of the parents need be "perfect" to produce "perfect" children.
So, weren't the Nephilum "perfect" children? The angels didn't break any specific commands from God, did they? After the fact, he was displeased, but beforehand, what law did they break?
So, wouldn't the death of the Nephilum be sufficient a "ransom" to pay for Adam's sin? Per the WT's teaching on justice, a perfect man had to die to compensate for Adam's sin. Well, in the flood, didn't a whole bunch of them die?
Shooting down WT theology is like shooting fish in a barrel!