1. Angels are referred to as “Sons of God.” Job 1:6; 2:1; 38:7
2. II Peter 2:4-5
3. Jude 6-7 note to connection to Sodom and Gomorrah and their sexual sin and “strange flesh.”
4. The angels from the fall of Satan are demons and these in Gen 6 are confined to be released in the tribulation period.
5. Jesus said angels don’t marry in heaven but he did not say they can’t reproduce in a human body.
6. You would not get giants from humans reproducing, if the giants came from the Godly line of Seth and the line of Cain.