A military conflict between the US and Iran is unlikely, because it will create much more problems for the Americans than it will bring benefits . Any military action will bring down the situation in the region. The conflict will create a global crisis and a new wave of terror. None of the Muslim countries has such a stable internal situation to approve the us and Israel's attack on Iran and thus risk causing mass protests of its own population, strengthening political opposition and provoking the emergence of new extremist and terrorist organizations.
Business expectations, the economic and political climate around the world will change for the worse. Americans will be accused of creating an atmosphere of instability. Will expand areas with high risk of investments, and the markets will decline, falling volumes of international trade.
In the direction of Europe will move the flow of refugees, which will result for the European Union a new political crisis and huge additional costs.