What part of "death to America" don't you understand?
The part where you don't think it's a reasonable response to the US assassinating their democratically elected leader,
installing a brutal dictator for a generation, constantly slapping crippling sanctions on Iran, assassinating their scientists, doing all sorts of underhanded efforts to stop their
limited nuclear program while US ally Israel has impunity to produce 100 nuclear weapons, assassinating their general,
supporting Iranian rebel groups, etc.
Really there are a lot of areas where Iran and the US could work together, most notably stabilizing and rebuilding Iraq (the US and Iran did work together some
to end ISIS rule in Syria. And working against Sunni fundamentalism in Iraq and Syria is another obvious area of cooperation.
Iran is also looking to modernize its oil industry and most of its industry, which the US could assist (and profit from) or at least get out of the way and
let Europe do business there. That was the Obama vision, where Iran limits and allows intl inspection of its nuke program (which under int'l agreements it is allowed for research and medical purposes)
in exchange for more open trade. The idea to get Iran hooked on modernizing and economic benefits of Western trade and then not want to risk losing that