In comment to his preamble, you can't save the world, and a significant portion of it not only does not want to be saved (revels in its victimhood, self-destruction, and craves any attention thus obtained), it refuses to be saved.
Similarly, countries will find their way to the form of government they are most accustomed to or desirous of, no matter what is done 'for' them. It has ever been thus.
One of life's lessons, and why I am far more willing to give a hand up than a hand out.
Here is opportunity. Use it.
Our national policy should reflect a similar attitude, imho: If people want a different government, they should lead their own way to it, even fight for it. We might send a little aid to them here and there if they do and we agree with what they are doing, if not there will be others to help them down other paths.
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As for bombing Iran's oil refineries, well, no, at least not now.
Here's why: Currently, unemployment is a problem there. The refineries would be fast-tracked back into service, and that would mean a boom in construction and repairs. Unemployment problem solved. Regime change comes from unrest, not a population with a paycheck. We keep the price of oil low by producing more, and their stock in trade is worth less. With no employment boom to quench the fires of unrest, that will continue to fester. Full bellies are happy bellies, even under despotism. Leave the refineries for the next government, they'll need the revenue to undo some of the mess the mullahs have made.
If it doesn't look like there will be a regime change, we can always send some cruise missiles in later.