Israelis don't want to wipe out Iran (as much as Iran doesn't want to wipe out Israel- I think they have a more generic aspiration to the end of what they call Israeli regime)- but they surely want a weak, divided, impoverished Iran, and they have been lobbying the US for a long time to wage war against it. The US unilateral withdrawal from the nuclear agreement has been in Israel's wishlist for years. Not because it improves the chances of peace or because it makes Iran less of a threat- quite the opposite. But because it weakens it and improves the chances of a war.