There was a comprehensive and successful peace deal in 2016 signed by the US, Iran, Europe, Russia and China. It was already signed and implemented, it was working:
https://en.wikipedia.org/wiki/Joint_Comprehensive_Plan_of_Action
Then when Trump got elected he unilaterally tore it up for no clear reason at all, he was the only one rejecting it. Now ten years later he's bombing Iran for no clear reason at all.

