>>26464 (OP)
The nephilim aren't necessarily humans mixed with fallen angels. That's one interpretation. There's another interpretation that doesn't require you to call literal demons "sons of God"...
All from Genesis chapter 6, KJV:
>"1 And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
>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."
Godly men chose for themselves wives based on their beauty rather than their godliness. This led to a falling away over the generations into idolatry and wicked violence.
>"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.
There were giants in the earth long after the flood as well, whom the children of Israel contended with after coming into the promised land. The most well-known example being Goliath.
>"5 And God saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually."
Notice the offspring are still classified as "men", not demons or demigods or whatever.
>"13 And God said unto Noah, The end of all flesh is come before me; for the earth is filled with violence through them; and, behold, I will destroy them with the earth."
Violence is the reason God destroyed them, nowhere does it mention corrupted DNA or seed.