Disputes and edit wars about the articles keep on going and will likely not go away in the coming years.

May be you can print the set of nine articles related to Rawat and show them to your parents. I am very curious to hear from you what they think of these articles.

However, with regards to "deprogramming" please keep in mind that sudden disillusionment for long-time ardent devotees can be a traumatic experience. I know this from personal experience with regards to the Indian guru Sathya Sai Baba. And as Anna wrote, followers may experience a sense of betrayal upon disillusioment.