Is that what is happening with religion? Systematic abuse?
In some cases, yes. For some people, giving up their religion is equivalent to announcing that they're gay. Doing so can cause families to ostracize them, friends to dis-associate with them, for job opportunities to mysteriously dry up.
When a person's entire sense of being and self-worth has been shaped by a religious culture, giving up that religion can set a person adrift. I've read testimonies from ex-christians who laid awake at night. It's Pascal's Wager at work: "If I'm wrong, then I suffer eternity in Hell.
What if I'm wrong?" All their lives they lived with the belief that pleasing God is the most important thing they must do--and now they must come to grips with the fact that not believing in God has to be the thing that would offend God the most.
Not to mention those that have suffered genuine physical harm thanks to their religion, such as children raped by pedophilic priests, children denied medical treatment by their parents who chose to instead pray away the illness. Children who were beaten because their parents believed the child's bad behavior was actually demon possession. People who have been ridiculed, abused, and even sent to prison because they were thought to be Satanists.
All of those are legitimate reasons, in my view, for people to get together with others and talk about their experiences in a non-judgmental environment.
I myself deconverted from Christianity to Atheism over the course of a year, and I had no one I could talk to about it. I underwent some serious "what if I'm wrong" fears, some doubts, and I felt adrift.
Here's the
FAQ for Ex-Christians.net in which lots of people talk about their negative experiences, using the site as a sort of virtual support group.