Correct, but as the bible states, the fallen angels in this case, possessed human males and then had sex with the human women, but the demons were able to pass some ‘demonic seed’ along, thus creating half human, half abomination.
I asked our most senior priest at our parish about this awhile back, he is a very smart man, has a PHd in history, he explained to me that these Nephilim were the first attempt of Satan to corrupt the human seed, so Jesus would not be born, but this did not work out so well for Satan.
We visited a local Serpent mound in southern OH last year, they have some of the Nephilim tools and other artifacts there, they are amazing to see, the ax head they had was HUGE, they also had a skull, which was not the first one Ive seen, the Nephilim skulls are missing one of the ‘plates’ that are used to form the top of the skull, humans have 2-3 of these, but the Nephilim have none, besides having double rows of teeth, this is one way to tell the difference, (besides the general size of course!)
I asked our priest about this, because I had went all thru catholic school and never once heard of them being mentioned, I thought this was strange, so I decided one day to ask a priest about it, Im glad I did now!
The only thing that still makes me wonder is how tall they actually were, in the bible it gives their height in jewish Els and Cubits, in the Els equation, the giants would have been 450ft tall, I think that is a stretch, and dont believe they were that tall, Im thinking more like 25-40ft at the most, but why would the bible list the height in Els, if it didnt mean anything?