Well actually I have some concerns about these religious groups sending material to soldiers (I highly doubt the gov sent either)
It is CLEARLY listed on the US postal service as well as the websites dealing with sending mail to soldiers that you cannot send any relgious materials contaray to the Islamic faith
"Religious materials contrary to the Islamic faith"http://www.usps.com/supportingourtro...strictions.htm
I don't think any religious group should be sending mail to soldiers with religious material. The mail getting sent through Iraq must be sent through Kuwait and Kuwait has very strict guidlines on what may be sent through their country.
I don't know much about scientology but I am not sure it wouldn't be seen as contrary to Islam. But I know there has been some issues with Christian material.