It's understandable that you are frustrated, but It might help if you can think of it in a different way. Your parents might not have read your research because they are brushing you off, they may just be scared that you are right and they are not ready to accept that right now.A cult member will do a lot of things to avoid uncomfortable truths.
Apologize to you parents, and accept and love them as they are. The fact is they may never wake up, and if they do, it will be in their own time, at their own pace, just as you left when you were ready. Peace comes with acceptance of things as they are, not how we want them to be.