Your point has not been proven at all, so relax. The reference to Enoch was in addition to those scriptures. But the fact remains that Enoch was apart of the scriptures and it sheds a great amount of light on this topic. But I can stay within the scriptures you mentioned and demonstrate that "the sons of God" are referring to angels:
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“Now it came about, when men began to multiply on the face of the land, and daughters were born to them, that [the sons of God] saw that [the daughters of men] were beautiful; and they took wives for themselves, whomever they chose.” - Gen.6:1
“The Nephilim were on the earth in those days, and also afterward, when [the sons of God] came in to [the daughters of men], and they bore children to them. Those were the mighty men who were of old, men of renown.” - Gen.6:4
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In both the scriptures above, a grammatical distinction is being made between "the sons of God" and "the daughters of mankind," ergo, the sons of God are a different group from mankind who are bearing beautiful daughters. If the sons of God was referring to men, the scripture would have said:
"Now it came about, when the sons of God began to multiply on the face of the earth and daughters were born to them ..."
However, the structure of the scripture demonstrates that there is a distinction being made between the sons of God and mankind who are bearing beautiful daughters.
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“Now there was a day when the sons of God came to present themselves before the LORD, and Satan also came among them.”
“Again there was a day when the sons of God came to present themselves before the LORD, and Satan also came among them to present himself before the LORD.”
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In both the scriptures above from Job, "the sons of God" present themselves before the Lord and Satan is among them and presents himself to the Lord as well. The scripture infers that the sons of God are angels presenting themselves to the Lord and not men, as Oldhermit would have us believe. It infers that both the sons of God and Satan are of the same genre and that their appearing is in heaven and not on the earth.
In order to suggest that the sons of God are men, how could Satan appear with them? There is nothing in the context that infers this. And there is nothing in the context that would suggest that Satan appeared with them invisibly in the spiritual realm. In addition, in Job 1:7 and 2:2, the Lord asks Satan "From where have you come?" and Satan's response is "From going to and fro on the earth, and from walking up and down on it." This demonstrates that where the sons of God and Satan were appearing before the Lord was not on the earth but in the heavenly realms in God's immediate presence, which would make the idea of the sons of God as representing men as being false. For men would not be appearing before God in the heavenly realms.