Israel hasn't actually attacked any country. Israel has either defended itself from attack (i.e. in response to thousands of missiles being fired at it indiscriminately) or carried out pre-emptive attacks in self-defence (i.e. 1967). If you believe Iran can be trusted with Nuclear weapons than you clearly have little knowledge of their various terrorist related activities and stated beliefs.
Report: Iran's Culture Ministry refuses to allow Barenboim to perform in Tehran (DPA)