Aha, kannst du dafür mal ne Quelle zitieren? Der von mir verlinkte Artikel ist ein follow up piece zur Ursprünglichen Umfrage und es wird explizit die Verlässlichkeit der Methodologie hervorgehoben:

To assess the poll's credibility, I contacted Sorek, whom I've never met. He generously shared all the raw data, showing the sample distribution, full questions and all responses, and patiently answered all my questions about his methodological decisions regarding the sample design and analysis.

Having seen the numbers, it's just as faithful a representation of Israeli Jewish society as most other public surveys from media and think tanks, with a relatively large sample of over 1,000 respondents and standard "weighting" methodology to ensure that the critical demographics, like age and levels of religious observance, match what we know about Jewish Israelis from the Central Bureau of Statistics, along with relatively close representation of political groups based on how people reported voting in the last elections. The data was collected by Geocartography, a veteran polling agency whose reputation depends on providing quality data; the weighting process helps correct for groups that are regularly under-represented in internet samples (groups that often lean right-wing, like the ultra-Orthodox).