I suppose if you were going to read only this passage in a vacuum…and then only focus on the parts that specifically mention humans…then…yes. Yes we could conclude the context is humans.
Let’s just look first, at this passage:
Jude 1:6-7
[6] And the angels who did not stay within their own position of authority, but left their proper dwelling, he has kept in eternal chains under gloomy darkness until the judgment of the great day—[7] just as Sodom and Gomorrah and the surrounding cities, which likewise indulged in sexual immorality and pursued unnatural desire, serve as an example by undergoing a punishment of eternal fire.
Jude gives us no room to wiggle here. He clearly links angelic sin…angelic fall…TO similar sins found in Sodom and Gomorrah. We cannot simply say this is a reference to the angels who fell with Satan….a warriors army fighting against God’s righteous angels. No! Jude tells us that these angels are kept in chains of gloomy darkness, their sins “just as” Sodom and Gomorrah, “which likewise indulged in sexual immorality and pursued unnatural desire”.
Indeed, Jude is so insistent on the issue, he pushes it twice; “Just as”….”likewise”.
If this incident is NOT the Gen 6 account…when else might we expect that angels have sinned sexually? And…what sort of sexual sin would be ‘unnatural’ for them, do you think? Jesus had already told us that angels “in heaven” do not have sex. That leaves fallen angels sinning with one another…like kind with like kind….or angels with humans.
IF we take this passage, and we hold it up against Psalm 82, where the “sons of God” are clearly NOT human…they are described as ‘elohim’…as members of a ‘divine council’ who have sinned against the ‘Most High’ and are being judged, then we also see that the human interpretation is not strong…certainly not probable.
Lastly…you claim it makes sense for it to be about humans…to show that the ‘context’ is to ‘not conform to the ways of the world’. While I agree that is a teaching the bible has in various places, I’m not sure that is the best, or right, teaching to take from this passage or particular events. Consider this passage:
Numbers 13:32-33
[32] So they brought to the people of Israel a bad report of the land that they had spied out, saying, “The land, through which we have gone to spy it out, is a land that devours its inhabitants, and all the people that we saw in it are of great height. [33] And there we saw the Nephilim (the sons of Anak, who come from the Nephilim), and we seemed to ourselves like grasshoppers, and so we seemed to them.”
Here we have clear reference to the Nephilim being giants. Big, scary dudes. The ‘sons of Anak’. There’s a few of them. Following on from this event, as Israel wanders in the desert and then settles in the land afterwards, we see God declaring war against these ‘giant clans’. We see them called various things, “Anakim, Rephaim”…sometimes “Amorites”. Recall one famous giant…Goliath? References to giant clans and the Anakim, Rephaim pop up all the way through Joshua. Even David does some mopping up. God is clearly declaring war against these beings.
Scholar Dr Michael Heiser posits that “The motivation is inextricably linked to the idea that rival gods seek to prevent Yahweh’s people from re-establishing the kingdom of God on earth.”
Indeed, we can look at the rebellion of the angels, as they ‘took’ human women and ‘came into them’ as a direct form of treason. These angels were attempting to ‘make in their own image’…to beget their own offspring to set up their own Kingdoms, so that they might be like ‘the Most High’. Not unlike Satan.
Thus, while “do not conform to the ways of this world” is a wise message, I believe what Gen 6 is portraying is another event of cosmic treason that explains why God had his people systematically slaughter their way through people groups. We know and accept Satan’s interference in trying to halt Christ’s coming into this world…we seem to miss the clear references throughout the OT to all these ‘bastard’ clans that did their very best to wipe out God’s people…all from the source of angelic rebellion in Gen 6.
Our earthly bodies have a different splendor to the heavenly bodies as Paul explains below they don’t mix that’s why demons possess people
1 Corinthians 15:40
40 There are also heavenly bodies and there are earthly bodies; but the splendor of the heavenly bodies is one kind, and the splendor of the earthly bodies is another.