The thing you gotta understand about Iran is they are zealots. They will not stop until they are dead because they believe they will go to heaven if they die in the service of Allah. They aren't going to surrender. The only thing that will work is regime change to a friendly or at least less suicidal regime.
Christians don't consider the law null and void. The law gets written on our hearts. The law being the ten commandments. The rest of those rules were specifically for Israel and part of their covenant (contract) with God. As long as they follow them they will prosper, if they stop they will be slaughtered and enslaved. Most of the laws are good to follow. The only ones we don't follow are the sin sacrifice laws because Jesus fulfilled the sin sacrifice for everyone. Temple is church as we no longer need the high priest because the holy spirit and Jesus are the high priests for the gentiles.
