Why did the United States declare war on Iran? What's the point?

The lifeblood of the American economy is energy, so energy is the core interest of the United States. We know that the United States is the largest energy consumer in the world, which makes it the largest economy in the world. The economic development of military power drives the economy with military power, so the United States uses the deterrence of its military power to realize the long-term strategy of global deployment to ensure that the country has sufficient energy. This is also the idea that the US military supports the country through war. Generally, a big country like the United States, such as China and Russia, will use their economic status (US dollars) to establish encirclement to contain and deal with it. In the face of global technological take-off and enjoyment, the military strength of many countries has also advanced by leaps and bounds. At this time, the United States began to panic, fearing that the future pattern would change, so the United States did not allow the military forces of other countries to influence and threaten its global strategy. The reason why the US military took military measures against Iran came from the report that Iran's nuclear weapons were obtained from the International Atomic Energy Agency (Iraq also came from this agency but no weapons of mass destruction were found, which shows that the purpose of the United States is self-evident). This also makes us suspect that the inside story of international atomic energy may be more complicated, but now Iran is said to have no ability to possess nuclear weapons at all, and its nuclear program can only be limited to energy and national development. Only when the nuclear concentration reaches at least 20% can nuclear weapons be made, but they are still far from this goal. As far as the current situation is concerned, it is impossible for the United States to attack Iran, because Iran's Meteor -3 ballistic missile can cover the US troops stationed in the Gulf and Israel itself. Because Americans attach great importance to the dead, domestic public opinion will be great and turbulent. In addition, Iran's army is huge and much stronger than Iraq and Libya. If war breaks out, it may not be possible to get out of the war within 10- 15 years, so the United States will not go to war with Iran easily. If war breaks out, it must first withdraw its troops from the Gulf.