Welcome to the board! I loved reading your colorful experience.
Don't give up on your children that are still in. My dad disassociated himself and tried to get the rest of the family out. It took me about 10 years for some of the things he said to me to sink in. I wish it had sunk in earlier but I am a bit of a hard-head. One of the things that did stick was that someday the society would have to drop the 1914 doctrine (lie) and that would cause a domino effect since everything hinged on 1914. It didn't mean much to me at the time until the "new light" came out about 1914. Lightbulbs started going off in my head.
Be patient with them, if you think they would read a letter from you, maybe put in writing why you now see things differently. Our brains are like computers, we have the ability to store bits of information and sometimes that information comes pounding to the forefront and tells us that something is just not right.
I look forward to hearing more from you.