More business for Claims Direct?

Now here's an interesting development...

The church of scientology is being taken to court in France for 'organized fraud'. There are some more details in here on the BBC and here in the Washington Post. This particular case is related to a woman being persuaded to hand over money in return for items such as courses and books that would, I guess, improve her mental and spiritual condition. She then claimed that these were fraudulent. I'm not really up on scientology, but are their claims for the wellbeing of their 'clients' significantly different to that of any other religion?

Would it be possible to sue the church of scientology if their claims were accepted to be true? Would it be equally possible to sue some other religions based on their claims?