why did the Romans want to expel them

There are several reasons for this; profanation of Mysteries (again, see Socrates/Plato and Jesus both being killed for sharing the secrets), Jesus being himself a member of the royal line of Pharaohs, the Calou giving the Essenes ancient technology which was partly used to, as mentioned, generate, distribute and store power, but also partly used to defend themselves.

The profanation entailed sharing the Kykeon (reminiscent of the Soma, the Ayahuasca, the Ibogaine, the Blue Lotus, and much more) which inspired the Eucharist ritual, which resembled intimately the Eleusinian Mystery rituals and the Bacchanalia festivals at least in part. Beyond this, as Jesus alludes to in Mark 4:11, he actively taught Mysteries, having learned from the ancient Mystery Schools in Egypt, Persia, Tibet, India and even more (being a Shaman himself, he was familiar with the Druids and was likely either King Arthur himself or what inspired him), to his disciples (remember, 12 for the 12 months, signs, Labors, Rowers, Knights, etc.). All of this is to say Jesus was involved with and trained by the ancient Craftworkers. His father was a Carpenter, right? Well, how much woodworking was done in those days? What did they build houses out of in that area during that time?

Jesus was the last of the Pharaohs. Remember how we found mummies with red hair still attached to the skull thousands of years later? Guess what color Jesus' hair was. Why did he wear purple? Why did the Magi first visit Herod in pursuit of the royal child of Prophecy? Why was he "mocked" with the title "King of the Judeans" (and who were the Judeans?)? The answer is pretty clear. Also, keep in mind that he wasn't the only one involved with royal blood - his wife, Mary, also descended from a noble line, a noble Priestess of Astarte (which should explain the resemblance to Artemis and the reference to Bees).

As explained, the Calou granted ancient technologies to the Essenes, a Pythagorean order of communal ascetics. Contrary to popular belief, this wasn't a men's club of any kind. Not only were women living there, being revered as Masters/Teachers, but children also lived there. From birth, they were trained in ancient ways to master the body and its esoteric functions. The important thing is this is supposedly at least one way they made use of and/or powered the ancient technologies which, again, revolved around the use of crystals. But that's not all: they also understood how to use "The Music" or, what might be better explained as soundwaves. Check out those huge stone spheres in Costa Rica. Now you know what they were used for.