I've have stated before that I oppose war against Iran. Nothing will shift me away from that view and the current migrant/refugee situation currently occurring in the Middle East reinforces my position. Iran is a safe and stable country, which has been accepting people fleeing from war-afflicted areas. War with Iran would mean that those people would then have to flee to other countries and Iran itself would be turned into a war-afflicted region, which would then create additional refugees. Further destruction in the Middle East will not solve any problems.
Iran is a heavily armed country, with a strong military and a large cache of weapons. If Iran were to become de-stabilised due to foreign military strikes, ISIS would likely infiltrate the nation and take large swaths of it over, much like it has in Iraq and Syria. Having significant amounts of Iran's military personnel and weapons absorbed into ISIS would be a far more dangerous situation than the current status quo, even more so when Iran is opposed to ISIS and ought to be included in the coalition against it.
Needless to say, anyone who supports war with Iran is terrible at military strategy, as well as a warmonger and a fool.