The biggest thing Israel can do now to help the current Iranian government implode would be to shut the heck up. Every time Israel opens her mouth against Iran and the Iranian leadership, Iran uses it to prop themselves up. Iran drags out the "common threat" rhetoric for why everyone must patriotically back the Ahmadinijad. By keeping her mouth closed, Israel would effectively yank that leg out from under Iran, leaving the Iranian leaders out to hang. Just put a damn sock in it already!!
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: Netanyahu: Israel benefits from Iran's loss of legitimacy