They have been chanting "down with America" - that does not mean "murder every single person in America with their missiles (which can't reach America)"
"Death to" is a mistranslation of "marg bar", a phrase that is also applied to traffic, and inflation.
Do the Iranians want to kill all traffic and all... inflation?
I'm grant you that I do not speak Persian, but I do speak Arabic and Hebrew. In Arabic the phrase موت لامريكا is common enough. And this Hebrew sign in Tehran says "prepare your coffins":
So I do appreciate you educating me on the literal meaning of the Persian phrase, yet I dispute your interpretation that they state no intention of murdering us. Quite the opposite, the more I research it the more Hebrew banners in Tehran I see and I can conclude not only are they capable of murdering myself and my children, they have intent as well.
