Reality check for @SecBlinken:The US-violated JCPOA-blocked food/medicine to Iranians-punished adherence to UNSCR 2231Throughout that sordid mess, Iran-abided by JCPOA-only took foreseen remedial measuresNow, who should take 1st step?Never forget Trump's maximum failure.— Javad Zarif (@JZarif) 2021…