If Washington is perplexed by Israeli "opacity" on whether it might attack Iran, that is no accident, since Israel's leaders are themselves torn – but also content to let fears of bluff and double-bluff play to their advantage.
Aware of daunting military difficulties and potential for diplomatic and domestic backlash should they try to hit Iran's nuclear program, Israelis have been sending mixed verbal signals that they hope may both encourage their US ally to up the pressure on Tehran, and unnerve their Iranian enemies.
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the whole story at the Jerusalem Post.