I have questions regarding "the sons of God" and giants from Genesis 6. Some Bible teachers believe that angels took the form of flesh (actual incarnation) to engender offspring with women, thus "Giants" came into being (Nephilim). This theological position from Genesis 6 is common.
The Nephilim /ˈnɛfɪˌlɪm/ (Hebrew: נְפִילִים, nefilim) were the offspring of the " sons of God" The "sons of God" have been interpreted as fallen angels in some traditional . Samyaza, an angel of high rank, is described as leading a rebel sect of angels in a descent to earth to have sexual intercourse with human females.
Angels begin consorting with human women, and giants roam the earth. It's a story about fallen rebel angels, boundary-breaking sex, violent and the sons of God were angels, so they had their pick of the most beautiful.
These were the angels who are now imprissoned. They were impisoned for having sex with human women. The children were the giants.
So the Sons of God in Genesis 6 are renegade angels, divine beings from God's heavenly throne who came to earth and had sex with human.