Jewish Israelis’ support for the war against Iran dropped by 15 points from the first week of the war, according to a poll released by the Israel Democracy Institute on Monday.

In the first week of the war, 93% of Jewish Israelis supported continuing the war, while in the latest IDI poll — conducted nearly a month into the war — 78% support it. More than twice as many Israeli Jews (11.5%) oppose the war as did at the beginning of March (4%).

As at the start of the war, only a minority of Arab Israelis are in favor of it, with their support dropping from 26% to 19%.

Most Israelis said Iran was more resilient than anticipated, with 56% of Jewish Israelis and 51% of Arab Israelis answering in the affirmative.

Most Jewish Israelis (62%) said that Prime Minister Benjamin Netanyahu launched Operation Roaring Lion against Iran for strategic and security-related reasons, while most Arab Israelis (55%) said he was motivated by personal and political considerations.

Over a third (35%) of Jewish Israelis said that the war against Iran would be sustainable in Israeli society for a month, while 28% said Israelis can bear it as long as needed to meet the operation’s goals. Among Arab Israelis, 33% said Israelis could endure the war for a month, while only 5% said the Israeli public can sustain it as long as needed.

At the same time, there was a rise in hope among Israelis: When respondents were asked for their outlooks in four areas, optimism about social cohesion was up eight percentage points from last month, reaching 30%; optimism about the economy rose to 34% from 31%; and optimism and the future of democracy reached 44%, up from 39%. Optimism about national security stayed about the same at 47%.

The vast majority of Arab Israelis reported that their mental health (85%) and financial situation (89%) had deteriorated, a slight increase from the last time IDI asked the poll question in November. Among Jewish Israelis, 43% reported a deterioration in their mental state and 36% in their financial situation, almost identical to the November 2025 findings.

The poll was conducted among a sample of 756 Israeli adults from March 22-26, with a 3.56% margin of error.