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.
Lots of Jews and many who have found Jeshua as the way to God have come afraid by the populist far-right politicians and extreme right agitators. Many do not want to come out in the public because of fear for bullying and terrorist actions against them. Many are also afraid that when they would unite with a group or would have a collective name that they would loose their characteristic property. As partakers of a particular Body they should know that it is more important how we make others feel and would like to be open and susceptible to them.