Andries,

I don't know so much about Singer so I cannot defend her work on Wikipedia.

and then you say: 

And also that the emotional pain, and trauma of disaffection and disaffiliation is not an invention by Margaret Singer or only occurs when people get deprogrammed.

Singer was one of the leading authorties about cults in the world.  That you haven't read her work is not good, given that you write so much about the subject over on wikipedia.  No wonder the point of view (and it definitely is a point of view) on Wikipedia about NRMs, cults, brainwashing, and all of the articles you have written about specific NRMs and cults etc.,  are so lopsided in favor of the cult apologists'.  How can you say that you do research for those articles when you only research the people who support your own pov?  That's not scholarship, research or good writing.  If you haven't read Singer's work, well, you really can't comment on it, either.

What I am certain of is that there is something like (self-)indoctrination. And the sexual abuse by SSB could only take place due to this indoctrination.

There is indeed something like a strong belief persistance in spite of overwhelming evidence of being wrong. This is something very strange and one could call this mind control but it is not unique to cults.

Could you please explain more clearly what you mean by those two paragraphs above?   I'm not understanding you and I think it may be the language barrier.