Or, to put it in his typical threat language, he has said, "If you would like to have good relations with the Iranian nation in the future... bow down before the greatness of the Iranian nation and surrender. If you don't accept [to do this], the Iranian nation will... force you to surrender and bow down."
The Columbia University talk now also falls into place. In A'jad's deeply indoctrinated mind, the students laughing at his absurd claim that there are no homosexuals in Iran simply confirmed how steeped they are in sexual sin. Columbia was Soddom and Gomorrah in this world view, and God destroyed those cities after their inhabitants refused to repent from homosexual activities. In his eyes he gave them their last chance.
Khomeini himself set the conditions for total war:
"I say let this land (Iran) burn. I say let this land go up in smoke, provided Islam emerges triumphant in the rest of the world."
That is the description of an all-out nuclear war.