I never raised a child "in the truth", but I would like to give you my viewpoint as someone who was raised "in the truth".
I will not deny that I disagree strongly with the way I was raised. And, of course, through my teenage years I blamed my dad for raising me in such a way... don't all teens blame their parents for everything? However, once I grew up and truly looked at it I couldn't and do not blame my dad for what he did, even knowing he would do it again. Why? Because as much as I disagree with it he did it because he loves me and believes it's what is right and will save my life. There was never a doubt that he loved me.
You can blame yourself if you'd like, but I can't see that it helps anyone or anything. Give yourself a break. My dad is as much a victim of this organization as I was. Just the same, you were as much a victim as your daughters. It is akin to saying, "My daughters and I were mugged and I blame myself for their suffering." It is not your fault, it's the muggers fault, you are a victim, too. In reality, it is not your fault, it is the organizations fault, you are a victim, too.
All parents make mistakes, all of them. What makes a good parent is that they make their mistakes with the best of intentions. You intended to save your daughters lives through the reality you believed was coming. There is nothing... NOTHING wrong with trying to save your daughters lives.
If it makes you feel better to apologize and you get the opportunity, then do so... but also forgive yourself. The only thing you are guilty of in this situation that I can see is being human.
Jackie