Avira, your reference to the furniture discussion matches the one I brought between Satmarer and Chazon Ish that yeshivas are the midbar away from negative influence. At some point, it is not fire or midbar any more, observant Jews need to look for the whole nation.
People here bring examples of confused people coming in.. by definition, if you stay inside, you don’t see millions of those who are getting lost. By some knowledgeable people, 4 out of current 6 mln Jews in USA are on the way to extinction. Definite statistics is that currently only 2% of Jews change denomination, the growth of O Jews is solely internal