The article states that 41 are for attack, 39 against. This is an even split. Your mistake is to look at the other numbers 52 versus 37 of people trusting the government about the Iran issue. This is a slightly different matter.
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U.S., allies conduct 25 strikes against ISIS in Iraq, Syria, coalition says (Reuters)
from the article: Haaretz poll: Israelis evenly split over attacking Iran