alt Hacker NewsHard for to assess that stat given the polling organization has this on their Wikipedia page.
“On 29 August 2024 the Israel Defense Forces released Hamas documents[6] that it said showed that, unbeknownst to the PCPSR, Hamas had secretly falsified its levels of public support in polls conducted by the PCPSR.[7] Rejecting the IDF claims, Shikaki said it was 'highly unlikely' that Hamas had falsified its results, but vowed to probe the claims.[8]”
Israel gov./IDF/etc. is known to falsify Hamas documents, force false confessions from UN workers using brutal violence and to regularly lie to justify its actions or shape public opinion. Anything they say about the other side means very little without actual independent investigation/corroboration or direct observable evidence. Independent journalists are allowed to go to Israel, so there's no need to lower the standards.
Results of the promissed probe: https://www.pcpsr.org/en/node/991
Not independent probe, but more information.