Iran's President is nuts

I shudder to call this man a president, he's certifiable. One day he's threatening us, the next Europe, and he's always talking of annihilating Israel.
So how do we deal with him? Is troop deployment necessary? It's tougher to invade a nation with 150 millions people than a country like Iraq which has 25 mill. Do we send aid to Ayatollah rebels like we aided Afghanistan in the 80s? The people of Iran are young and pro-Western, so it's in my hope that the people will overthrow their government.
When you can get a man like Jacques Chirac to threaten with nuclear weapons, you know the situation is serious.