Blockades are not simple or funny. They are an internationally recognized act of war. If you want to see a prime example of one that has consequences, look no further than 1967, when Egypt cut off the port of Elat on May 22. The Israelis used it as a casus belli, destroyed the Egyptian Air Force on June 5th, and pushed their army out of Gaza and the Sinai within 3 days.
You are talking in circles now.
First you say a blockade is serious stuff that starts wars, then you say an invasion like Iran did on our soil in 1979 is not as serious as another invasion that happened in Korea, then you say invading the soil of another nation and taking captives is not serious, and now you go back to saying a blockade is serious stuff, implying the invasions like in Iran are not consequential.
I cannot make hay of your argument, but one thing I am certain of is: Iran has declared war against America, has executed that war in different ways since 1979, it has never declared the war is over, and the US has every right in the world to blockade that nation due to the Iranian provocation.
It is not America that started a war, it is Iran and they are the enemy. Just because we had a worthless president in Carter in 1979 does not mean America is not committed to win this war now.