No, Netanyahu, Iran is not secretly planning to nuke Israel
http://www.vox.com/2015/3/3/8140991/iran-nuke-israel
Israeli Prime Minister Benjamin Netanyahu has real reason to worry about Iran acquiring a nuclear weapon. The country has indeed been taking steps toward a warhead for years, often in secret. A nuclear-armed Iran would pose a greater threat to Israel and to the Middle East as a whole than it already does, by using its nuclear deterrent as cover for more bad behavior such as backing anti-Israel terrorist groups and supporting Shia militant groups. And it would increase the risk of accidental war and of terrorists acquiring poorly secured nuclear material
President Obama sees that danger as well; it's part of why he shares Netanyahu's determination for preventing Iran from getting a nuclear weapons program, even if the two leaders disagree sharply on the best way to do it.
But there is one danger of an Iranian nuclear program that you hear a lot about but is largely groundless: that Iran wants a bomb so that it can launch an unprovoked, suicidal war against Israel....
"The days when the Jewish people remained passive in the face of genocidal enemies, those days are over," he said, drawing one of several parallels between Iran and Nazi Germany as he spoke directly to Holocaust survivor Elie Wiesel, who was in the audience. "I wish I could promise you, Elie, that the lessons of history have been learned. I can only urge the leaders of the world not to repeat the mistakes of the past."