Of course I must strongly disagree with you, since Jude 1 with the conjunction "Even as..." is using the sin of Sodom and Gomorrah to describe how those angels went after strange flesh.
Obviously, Jude 1 is speaking of the angels that sinned in Gen.6 during the days of Noah, as Peter also referenced that event, linking their sin with the time of Noah and not with the time before of old when Satan first rebelled. Nice try though:
2 Peter 2:4-5
4 For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;
5 And spared not the old world, but saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world of the ungodly;
KJV
Those specific angels of Gen.6 that sinned during Noah's day are chained in hell waiting on the Judgment day. That is not all of the one third of angels that rebelled originally at Satan's rebellion.
Well, sure there is a BIBLE RECORD OF FALLEN ANGELS TAKING WIVES OF FLESH WOMEN. It's plainly written in Genesis 6:
Gen 6:2
2 That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.
KJV
Gen 6:4
4 There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.
KJV
The phrase "men of renown" means 'men of the name', i.e., men of the legend. It's pointing to the ancient mythologies of gods upon the earth that's written in several ancient cultures.
2 Sam 21:18-22
18 And it came to pass after this, that there was again a battle with the Philistines at Gob: then Sibbechai the Hushathite slew Saph, which was of the sons of the giant.
19 And there was again a battle in Gob with the Philistines, where Elhanan the son of Jaare-oregim, a Bethlehemite, slew the brother of Goliath the Gittite, the staff of whose spear was like a weaver's beam.
20 And there was yet a battle in Gath, where was a man of great stature, that had on every hand six fingers, and on every foot six toes, four and twenty in number; and he also was born to the giant.
21 And when he defied Israel, Jonathan the son of Shimea the brother of David slew him.
22 These four were born to the giant in Gath, and fell by the hand of David, and by the hand of his servants.
KJV
Why would God's Word bother to describe that giant that had six fingers on each hand and six toes on earth foot, and was of great stature (Hebrew madown dealing with the idea of height)? It's because it's to show the giant as a HYBRID. You might find a very few today that have six fingers, but it's very rare, not normal, showing a mutation. That means this cannot be used to try and say the giants were just strong bullies.
You make an excellent observation on "Even as" in Jude 7.
But if we look at the previous verses we see that verse #7 is Jude's 3rd warning of "Apostasy".
First warning was and the example he uses was Israel in their unbelief.
Second was the angles which kept not their 1st estate.
Third is the people of Sodom and Gomorrah.
"Even as" then IMO refers to the 1st and 2nd warnings of APOSTASY and IS NOT specifically to angels being involved in Sodom and Gomorrah.
Please read verse #6 carefully and when you do you see that it ends with the judgment of those angels. That is the end of the 2bd warning.
Again, look at verse #7 and you DO NOT see angels at all. It says "CITIES" not angels.
Now notice the phrase......"Having in like manner with these cities" in verse #7 ... has the meaning that all four of those wicked cities including Zeboim and Admah were guilty of "fornication" and the deviations associated more generally with Sodom and Gomorrah.
Jude reveals here that Zeboim and Admah were similarly guilty with Sodom and Gomorrah and the sin was Homosexuality among the humans in those cities. Failure to note this has led some people to interpret this as meaning that "angels" committed fornication and went after strange flesh (Sodomy) like the angels!
But of course when we study the whole Bible and consider all the ramifications we see that Jesus said in Matthew 22:30, "In heaven the sons of God shall be as the angels of heaven who neither marry, nor are given in marriage," indicating that angelic life is utterly and completely different from life on earth and one can not interact sexually with the other.
Jude 1 IS NOT speaking of angels who sinned in Genesis 6. Lets read Jude 1 shall we..........
"Jude, the servant of Jesus Christ, and brother of James, to them that are sanctified by God the Father, and preserved in Jesus Christ,
and called".
As you can see, there is no mention in Jude 1 of fallen angels of any kind.
As for 2 Peter 2:4, I agree. He is speaking of fallen angels however what you missed and it is the key, the event Peter is talking about took place BEFORE man was put upon the earth, when there was a rebellion against God led by Satan whereby 1/3 of the angles rebelled. That my friends means that the fallen angles were " cast down to hell and were delivered into chains of darkness to be resereved unto judgment".
That my friend according to your own Scripture reference that the "Sons of God" in Genesis 6 are fallen angels could NOT BE FALLEN ANGELS" as they were all chained or in hell.
