Surveys can be very unreliable. The authors of a survey usually are looking for confirmation of their hypothesis, and people answering a survey tend to give the “right answer.”
Consider that based on scientific techniques one would exect that Britain overwhelmingly wants to stay in the EU, Netanyahu and Cameron were both voted out of office in the last election, and Jeb Bush has a lock on the Republican nomination for president.
P.S. Given the strong economic and social incentives to be “off the derekh”, one might want to study why anyone would willingly give up most of their economic prospects and agree to live in a marginalized ghetto just because Ha-Shem told them to 3000+ years ago.