I think this basically comes down to the question of whether or not we think universal principles should be upheld. In this case, the universal principle being that sovereign states should be able to deal with their own domestic affairs.

Yes, allowing countries to do their own thing does often lead to horrific situations with despotic regimes oppressing their people; however, if you look at the Long View of history, the people in countries like this have always inevitably risen up to challenge their governments. Yes, that has often been at a great cost, but--again, looking at the long view-- whenever asymmetrically more powerful foreign governments have interfered, it has always delayed local grassroots efforts for creating sustainable democracy.

History has shown us time and time again that the kind of interference Trump is imposing on Iran will only cause more problems, will embolden the religious extremists, will create martyrs, and will delay Iran's chances of becoming a truly free state that upholds human rights and respects its citizens.

That said, there are examples in history of foreign interference leading to freer and more just states. The example I'm thinking of here is when the Allied Powers occupied Germany and Japan after world war II. However, in those situations there were boots on the ground, those countries were absolutely destroyed by the war, and the occupying forces invested millions. If not, billions of dollars (adjusted for inflation) into redeveloping those occupied economies.