Scientology, et al

[PrawnSkunk]

I am doing a school project on Scientology.
I am asked to present a short paragraph to summarize a religion in an extreme positive or extreme negative light.

Here is my paragraph so far:

Scientology is a religion invented by science fiction writer, L. Ron Hubbard. This is what he believes:

75 million years ago, Xenu, an evil dictator of a Galactic Confederacy, realised civilization was overpopulated. Xenu kidnapped billions of his own people, froze them in a mixture of alcohol and glycol and banished them to the planet of Teegeeack. The aliens were unloaded into volcanoes, which were then detonated with hydrogen bombs.

The surviving spirits, called thetans, clung to the minds of humans. The Church of Scientology now urges its followers to cleanse their souls from these harmful spirits through auditing sessions. These sessions cost thousands of dollars, and are nothing more than a cheap scandal by the Church to take money from it’s loyal believers.

What could I do to further improve this paper?
What are your thoughts towards Scientology? Is it a religion or a cult?