Do you feel the same way about the economic sanctions against South Africa (https://en.wikipedia.org/wiki/Comprehensive_Anti-Apartheid_A...)?
"If soldiers are not to cross international boundaries on missions of war, goods must cross them on missions of peace." - Mallery, Economic Union and Durable Peace
Thus, embargoes are acts of war. Also, as evidenced by this very article, they don't tend to have the desired effect on their targets anyway, instead largely affecting innocent people and especially those of lesser means.