Islam, to some degree, has also characteristics of a cult, as well as certain other main religions.
You seem to be forgetting that all the poor fools joined them voluntarily. They voluntarily ruined their lives, similarly to people who start drinking, abusing drugs and so forth.
I agree that this so-called Church is dangerous and it should be dealt with accordingly, but you can't blame somebody else for your own stupidity and weakness. If I started drinking and gave up the university, I would most probably end up as a broken drunkard living in a railway station in a paper box. People wouldn't say "look at him, that is so sad, we must help him", but "look at this idiot, he could live a potentially promising life, but instead, he wasted it."
But again, the stupidity of the scientology's victims doesn't excuse their exploitation of other people. Both sides are to blamed.