This is not a matter of our arrogant outlook. It is wrong to murder people in front of their family members. (...) No we don't have the capabilites to thwart every evil dictator in the world, but we gave people a chance who had no chance, and that is a good thing.

Okay. Take this thinking a step further.

I think it would have been a lot cheaper and easier to thwart any number of other evil dictators on this planet. So if stopping the reign of an evil dictator was the motive behind the war, why specifically this one? You've said so yourself: We can't go doing it everywhere, so we had to pick one. So. Why this one?

If we're going to get into the rationalization of reasons behind the war, then we have to rationalize it all the way to its logical conclusion. What was the ROI for ousting Saddam specifically? What made it better than liberating any other country with an evil dictator?