Fact1: USA was founded on a genocide, with an actual legal proceeding to establish that indigenous people had no soul and no rights (Valladolid controversy). Fact2: USA employed slavery for centuries and later replaced it with "wage slavery", and actually never abolished slavery for convict, leading to the highest carceral population in the entire world. Fact3: The USA has broken most of its peace treaties (first and foremost with indigenous nations) and annexed all its neighbors (Texas, Puerto Rico, Haiti, etc).

That's just scratching the surface. Please note i'm not defending the Iranian government which is monstruous. I'm arguing the USA government is just as monstruous. And nothing will ever justify a country attacking a foreign nation. Remember when attacking Iraq and Afghanistan was supposed to liberate their peoples? See how that turned out.