if he did not spare the ancient world when he brought the flood on its ungodly people, but protected Noah, a preacher of righteousness, and seven others;<quoted text>Sweetie, the "sin" that God was making the Christians of Rome pay for was idolatry. His first punishment was to send them to religious ceremonies for Pagan Gods where such behavior "men with men" and "women with women" was expected of the participants. There was no punishment from God for these acts, no Sodom & Gomorrah like genocide, no rising up of the rest of Christianity to wipe out the Roman Christians, as in the story of the Levite and his concubine in Gibeah, nada. Paul does say that all the acts that God gave them over to are worthy of death in His eyes, including the same sex sex, but not even Paul calls for it to be done by the few remaining "good" Christians of Rome or by any other Christians.
if he condemned the cities of Sodom and Gomorrah by burning them to ashes, and made them an example of what is going to happen to the ungodly;
What does this tell you about the ungodly???