Because only we can vaporize entire cities full of civilians under shaky pretexts
We all know what the truth is. In reality the tough stance against Iran is and always has been all about access to oil, influencing the strategic balance in favour of the axis US-Saudi Arabia-Israel, and limiting Russian influence in the region. Everybody knows this and that's why nobody in his or her right mind buys the current sick Bolton nonsense.
Don’t the sanctions prevent access to Iranian oil?
Personally I think it would be interesting to see EU have to defend its interests in the Middle East patrolling the Strait. There’s no need for the US to be doing it ourselves this time around.
But if you mean something other than Iran blocking free passage in international waters, you’ll have to clarify.