As Atrios has pointed out repeatedly, it seems that -- in the Middle East, at least -- the only humanitarian thing we can think of doing is "humanitarian bombing". That and training and arming "moderates" who wind up fighting against us as one of the "extremists". In fact ISIS may have come from the "moderate" rebels against Syria's government that we supported.
It may turn out that we have to go after ISIS, given their propensity for brutality and overt bragging about it. However, if we do, we must satisfy three requirements. I add that those requirements must be satisfied for any military engagement in the Middle East. ISIS is just the most plausible example.
1. Pick one military objective, and abandon all others. In the case of ISIS, abandon things such as preventing Iran from getting nuclear weapons. (BTW, these days, the US with nukes is scarier than Iran with nukes. It is all too plausible to see the US nuking Iran, motivated to prevent the possibility of Iran nuking someone.) Stop all military action in Pakistan, Yemen, and elsewhere not a part of going after ISIS.
2. Audit the CIA, the NSA, the DoD, and other intelligence and national security organizations, to make sure that we aren't being fed propaganda, lied to, etc. We must also check for involvement with organized crime, and alliances contrary to our own foreign policies.
Example of this: the CIA rendering people to prisons in Syria and Libya, despite their being opponents of ours.
3. Take the kingpins who decided to invade Iraq, who issued the orders, and who pushed the invasion in the media, pick out (say) five of those at random, and chop them to pieces or otherwise torture them to death on national television.
About pushing the Iraq invasion in the media: I'm not talking about those who advocated the invasion in their articles. As the word "kingpins" implies, I am aiming at the top people who gave orders to slant coverage in favor of the invasion, or who required reporters or editors to support the invasion.
If we had a free press, I wouldn't even be concerned about the media issue. If one media faction had orders to promote the invasion, we would have seen numerous others opposing it. Instead of a free press, we have one under potentially complete control.
News blackouts can't occur under a free press.