That's all very fine, but we need to develop such a 'danda' first.
You can't go around all bluster and breathing fire and brimstone when your actual capabilities to follow through on your threats are nowhere near what they need to be.
Yeah, when you're the strongest (economic, cultural, technological and military) super power the world has EVER seen, you can usually get away with doing things others would hesitate to.
Let's not fool ourselves - the US as a global power can probably take on the entire world on its own and still scrap out a victory. Taking on Iran militarily is a piece of cake in terms of destroying the country - they have no need to occupy it like Iraq or Afghanistan.