Here are my first thoughts arising from looking at the book of Enoch, a non-canonical apocryphal text.
The second dream of Enoch has animals that, according to Biblical Scholars RH Charles and GH Schrodde, represent different types of people and persons in history. They include Sheep representing the faithful, and a Wild Ass representing Ishmael. If this is so, Jesus riding into Jerusalem (representing Heaven) triumphally as King on the colt of a donkey may speak prophetically.
If Camels represent Nephilim, then we may also wish to look again at Matthew 19:24 –
And again I say unto you, It is easier for a camel to go through the eye of a needle, than for a rich man to enter into the kingdom of God. (KJV)
Many investigations into the meaning of Eye of a needle, including those that draw upon the Quran and the Bahá’í Scriptures conclude that the eye of a needle represents a gate into (on Earth) Jerusalem, and (reflected) in the spiritual realm, a gate into Heaven.
If the Nephilim are the hybrids of fallen angels and humans, then they are, I think somewhat obviously, seriously unlikely to get into Heaven, so the words of Jesus could mean that a rich man getting into Heaven is about as likely as a Nephilim getting into Heaven, although of course Jesus does go on to say that God can make the former possible. The reference might be lost on most people today, but His followers would probably have grasped the reference immediately.