Jehovah's Witnesses-What is your viewpoint on Gen 6:1-5?

I would like to know in your teachings who the sons of God is? Who the Nephilim was? I am interested in seeing what the Watchtower teaches regarding these verses.
Update: How do you explain the following? 1. The sciptures is talking about men on earth. 2. Angels do not marry.(Mt 22:30) 3. No where does it say that angels made bodies for themselves. 4. The nephlim were already on the earth. 5. Where does it say they were giants? Now ponder on this, that the sons of God were... show more How do you explain the following?
1. The sciptures is talking about men on earth.
2. Angels do not marry.(Mt 22:30)
3. No where does it say that angels made bodies for themselves.
4. The nephlim were already on the earth.
5. Where does it say they were giants?

Now ponder on this, that the sons of God were faithful men and the daughters are unfaithful women. Thus sons of God being righteous and daughters of men being unrightneous.
6 answers 6