After World War II the children which were placed in Catholic families often found no Jewish families to take care for them or to bring them up in Jewish traditions. Most of them even did not have the opportunity to learn Hebrew and got estranged from Jewish traditions. They married and got children who started to wonder about their ancestors. Several of them also wanted to go back to the Jewish culture and found stronger bounds with Jewish religion, whilst others wanted to keep their faith in the Messiah, but did not want to be counted under the trinitarian Christians.
From the 1930ies there was a feeling it would be better to bring Jewish children away from the European mainland into safety against the upcoming anti-Semitism. Those children came mostly in a non-Jewish environment and some were even submerged in an other religion. Many years later they, their children or grandchildren wanted to find their Jewish connection again and would love to worship the Only One true God again. for that reason many look for becoming to be recognised a as Jew again, though these days they see the danger again of the uprising anti-Semitism, which makes them afraid to come into the open with their faith.