The UK and America destroyed Iranian democracy and installed a police state in it's place. There is no "death to Europe" or "death to jews" anywhere in their slogans, because they specifically want to destroy their neocolonial occupiers. As an American myself, I empathize with individuals that fight for the freedom of their people. The founding fathers of America extolled the values of self-determination, and I agree with their reasoning more than I see the logic in Trump's expensive, taxpayer-funded war.

Look at your argument from the European or Indopacific perspective - why does a nation like China or India need to participate in a joint blockade? What is the value in attacking Iran for a nation like Pakistan or Egypt? The American goal of "stop them from making a nuke" is clearly not possible from an air campaign, and nobody but Israel is in Iran's crosshairs. The Gulf states all have fragile economies that won't survive the type of asymmetrical conflict that America is equipped to wage. Even rebel groups like the Kurds don't see any promise in attacking Iran, and have told American diplomats that they're on their own. They all know that the promises are empty, and a broken or Balkanized Iran would be the end of their regional stability.

Interventionism is not a helpful policy for Iran's people. Arabs know it, Europeans know it and most of the Americans and Israelis know it too. The status-quo is only confusing if you assume that the Arab and European states are run by morons that want to destroy the Middle East.