W
In that quote Jude and Peter are reminding them of Gods judgement in that he too judged the angels that rebelled 1500 years before the flood.....It is quite the stretch of the imagination to link that to Niphilim angelic beings...The gest of Gen 6 is being misunderstood. Peter tells us this in 2 Peter 3 that God ONCE before judged the world because of SIN, and He will do it again, but He is longsuffering and desires that all men come to repentance and not suffer the same judgement as did those before of ancient times when the world stood in and out of the water..............Me thinks you been watching too much Hollywierd maybe...
These fallen angels are already in eternal bonds under darkness. The angels who didn't go after strange flesh(Woman In gen 6) are still operating to this day. Their eternal bonds and execution of Gods judgement comes after the 1000 year reign.