Two questions that were submitted to me:
1. I have read/heard that Nephilim were angels?
The Nephilim (נָפִיל (nĕphiyl)) were the offspring of the sons of God and daughters of men. If the sons of God were angels, they were fallen angels. Therefore they would have been demons.
The Hebrew Lexicon says:
It means excellent, nobel, skillful. Giant. Rebels, apostates, fallers. - the etymology of this word is still uncertain
2. Why would God be "sorry" he made man if he's omniscient and He knew exactly what we would be doing when we got here???
Well this is why God is the one who provides our way for salvation. He knows and knew that we are not capable of choosing good. You will find God's favor in faith in Him alone. Noah found favor because He trusted God. The others had become so evil and corrupt, the Lord was sorry He made man. Remember that we are made in the image of God. Think about Jesus on the earth. Did He feel emotion? Yes! Remember when Lazarus, his best friend died? Even though Jesus knew that He would bring him back to life, He wept. It's the shortest verse in the Bible (John 11:35). Jesus literally shed tears of grief.
Yes God knew that man would become corrupt, but He also knew that Noah would continue in faith. Some of this is hard for our little minds to completely understand, especially God's omniscience.