I also donāt want her to feel bad that sheās feeling like she has to hide things from her other family.
I think this is important. We know they work on guilt....yet you also don't want to teach her to lie by omission or become secretive. Secrets are never healthy.
I think the only solution is training her how to think, rather than what to think.
For example, with regard to magic and violence in Star Wars. You could ask her whether she thinks an aeroplane would seem like magic to a bronze age shepherd? Therefore is it magic, or just future science?
(I think there is no real violence in Star Wars but anyway). You could ask her, if it's not the most terrible violence when she visualises Armageddon and all of those millions of children being killed for the crime of not being lucky enough to be born into a witness family?
Isn't Darth Vader using the Death Star to destroy worlds not the same thing as Jehovah destroying billions here?
If she says that Jehovah is just, you could ask the following: "Would a child being killed on Earth view Jehovah any differently than a child being killed on Alderaan would view Darth Vader? Would either be any less evil from the point of view of the murdered child?"