Hi everyone,
The Nephillims which you all are referring to, was a hybrid being, If you can recall in Genesis 6 verse 1, the sons of God,(angels) saw that the Daughters of men were fair, and these angels(fallen) took wives on the Earth and bore children. So the product of the sons of man + the daughters of men resulted in Nephillims or Giants. This creation, was evil , and have taught evil to other men on the earth.This is why we read in Genesis 6 verse 5 , that the Lord saw the evil which was upon the earth.etc and decided to destroy the earth because of the wickedness of man, their thoughts etc, by the flood. However, Noah as we continue to read, was just and perfect in his generations, meaning that he was not evil or a hybrid being.So God , used Noah and others** to start over a "pure generation" or blood line of man.(I dont mean pure as in sinless for Noah, he still came from ADAM)
Questions: Do you wonder , why GOD made it rain for that lengthy period?, Why Noah's ark was that big ? How much water will it take to drown a GIANT as well? I guess it answers itself. What we call too ,Demons today or Unclean Spirits, are actually "old" Nephillim's Spirits.This why we don't actually "see" a demon actual form.After the flood, when they died, their spirits left their flesh bodies and continues to roam the Earth,seeking who it may dwell in!
As for the question about how these fallen angels could have taken on a human form, its quite simple.It is not strange that angels could change their forms, for example, the Bible says that SATAN can transform to an angel of Light (2 Corinthians 11:14),and its not hard to grasp if the bible warns us on entertaining strangers ( Hebrews 13:2 ).
Dont take my word for it! All the answers to this question are given in the Holy Bible!
God Bless!