When sent to an article about nephalim by another member, I encountered the following:
In addition to Enoch, the Book of Jubilees (7:21"25) also states that ridding the Earth of these Nephilim was one of God's purposes for flooding the Earth in Noah's time.
and
According to these texts, the fallen angels who begat the Nephilim were cast into Tartarus/Gehenna, a place of 'total darkness'. However, Jubilees also states that God granted ten percent of the disembodied spirits of the Nephilim to remain after the flood, as demons, to try to lead the human race astray (through idolatry, the occult, etc.) until the final Judgment.
Why on earth would god flood...er, the earth, partly to kill the Nephilim and remove their evil,
and then release a bunch of them to lead humans astray again?
We do not hate others because of the flaws in their souls, we hate them because of the flaws in our own.