When you hear Trump, Bolton, Pompeo, or some other yahoo say, "If Iran's leaders would join the rest of the world, the US would not . . ." what that really means is, "If Iran's leaders would kowtow to US interests, the US would not try to overthrow Iran's regime, or stir up civil unrest, or threaten them with obliteration, or surround Iran with military bases and warships, or wage economic warfare on them (sanctions, embargoes), or collapse its economy and currency, or sabotage Iran's infrastructure (computer networks, electrical grids, water reservoirs, etc), or orchestrate terrorist attacks on Iran's populace, or seize Iran's assets (gold, currency) held within western banks, and so on.