Sure, but you can understand why US citizens and European citizens don't feel the same urge to go out and protest something that their taxes don't directly contribute to.

> You can still protest to signal support for usa to keep its hardline stance on Iran or to increase measures.

If you care about the wellbeing of Iranian people, you have to acknowledge that a "hardline stance" of sanctions also contributes to their suffering. I'm not sure why you'd expect to see people out on the streets asking for more of that.

https://www.thelancet.com/journals/langlo/article/PIIS2214-1...

> You can also protest to make sure the horrors aren't forgotten and to signal to those suffering in Iran that they aren't alone.

True, but as a citizen you have much less moral responsibility to protest that than a situation your government and taxes are supporting. Which probably explains why you don't see as many people out on the streets about that.

I'd say it's also tricky in such situations to protest and not have your protest co-opted to justify aggression. Chomsky made this point on Iran: "Suppose I criticise Iran. What impact does that have? The only impact it has is in fortifying those who want to carry out policies I don’t agree with, like bombing."

https://www.ft.com/content/afc74988-8c96-11e2-aed2-00144feab...