Original sentence: Research in the USA has shown that disproportionally many people of Jewish descent join NRM's which worries some in the Jewish community.See also Brainwashing controversy in new religious movements
Edited sentence: Research in the USA has shown that disproportionally many people of Jewish descent join NRM's which worries some in the Jewish community, because it is a fact that some NRM's demonstrated themselves to not be as innocent as they pretend to be, to both the public, to new comers, and to members alike