They were stolen by the communists.
I ate a shabbo meal by a family once, and the baalas habayis told me a story about when her sister moved to israel in the early day if he state. She had already bee. Living here for a while(they were raised frum) and her sister had to live on a kibbutz for two months before joining society. When the time came for her sister to leave, this woman went to pick her sister up. Her sister is sill in he middle of a meeting, so hes standing outside the room, and she hears them telling her sister “these religious people are all crazy, by now you should uderstand that! How can you go rejoin this ridiculous outdated religion, when we hve a state?”
So she barge into the room, and screams at the person telling her sister this “You say I am crazy? You say your grandparents were crazy?” And she takes her sister and they leave. She said it took a fee weeks to normalize her sister from the two months worth of brainwashing she had experienced, but, if her sister had c’v not staye frum after that, would you not call her a tinok shenishba?