From my life experience I have noticed that the main way that Jewish groups, both in the more liberal groups (reform/conservative) and the more fundamentalist ones (othrodoxy), keep the community in following their current beliefs is by keeping their congregants either uninformed about certain concepts and/or misrepresenting them.
For the Orthodox my experience has been that the leaders of the Jewish frum communities constantly try to avoid exposing their community to secular concepts, mainly when they pose a threat to Jewish beliefs and sometimes even when they don't. When they do present secular concepts that oppose Jewish theology it is almost always presented in such a way that misrepresents them.
The same goes for the Reform/Conservative leaders as well, but mostly from a different front. The way they keep their congregation Jewish is usually by not informing them of much of what is in the Tanach/Mishnah/Talmud/etc. There is so much ignorance of basic Jewish halachah even. It isn't that they simply disagree with these tenets and halachahs, they are totally ignorant of them. I know of many liberal Jews who don't know what tefillin are? Who don't know when Shavuos is? Who don't know that Jews read from the Torah on days other than Shabbos, let alone that Jews are supposed to pray on days other than Shabbos as well?
Many times when Jewish subjects are discussed I feel that they truly do misrepresent those subjects. I once heard a reform Rabbi claim in front of a Jewish learning group that if Rambam were alive today that he would support driving to shul on shabbos. Although I don't think that Rambam would be as fanatical or fundamentalist as todays frum yidden, I think it is truly ludicrous to propose that the Rambam would actually drive to shul on shabbos. Why is he saying this? To make Judaism more palatable to Jews who already accept much of secular society. I have a feeling if he talked about what Rambam really felt on many subjects, his group would be turned off by it, and I can't say I blame them, but does he really think that misrepresenting the Rambam is really the proper approach?