Hey buddy, you caught me on a busy weekend, so let me give you my suggestions and see what you can do with them rather than rewrite it for you. If you still need more help though, feel free to ask. For the record, all five of the query letters I have submitted were accepted for publication so while I'm still fairly new at this, I'm not exactly a neophyte.
First, Yes, you do need to cut down the number of celebrities. A list of fifteen of anything is too bulky. I think six would be your best bet. Plus, since your story isn't about them, I wouldn't open with them. The problem is that when you open your query letter talking about famous people and then in the next paragraph say that your book isn't about them, the edito is very likely to stop reading at that point. Sell your book on its own merit.
You can talk about the person in the book having had a hard time with the Watchtower religion, but you have to sound neutral when referring to it. The reason is that you lose your credibility when you sound like you have an ulterior motive. An editor is going to be thinking about what kind of legal issues he could be getting himself into and not be open to reading more. So, you can say that the person in the book felt like the Watchtower was a regime, but don't call it one when referring to it in your query letter. Do you understand the subtle difference?
Start with that and I'll reread what you come up with if you want me to. Good luck.