One could almost agree with you that it is "not our business-" until the part about a state bent on exterminating the United States with the same types of weaponry that was used to extinguish whole populations of undesirable groups, and the ones used in the Iran conflict.
As an Active Duty Officer, I am consistently amused by people who do not serve in the armed forces dictating what "we" feel about a given topic. The United States makes it its business to know the affairs- internal or otherwise- of any given country, especially those which are determined to fund, promote, and contribute to its demise.
If you are being consistent, and you are truly for the total and complete autonomy of a state to dictate their affairs without notice from others, then you are neither able to give your input on any given subject which concerns states outside the United States, nor share in the development- positive or negative- of our country's response to those issues.