As far as I know, a large majority of Israelis support the whole liebensraum thing, and fucking up Iran (whose government are also a bunch of murderous shitbags, btw). We don't really know how many "Joe six-pack" iranians support this confrontation. Often, even people who are against a government will support warring against a perceived enemy, which is why so many leaders, when in trouble at home, start wars. See Putin, Bush, Netanyahu, maybe Trump next, and a looong list.