Loader:
You assume that the only way to enforce international law is war. That is not remotely true. To the extent that the terms of the Gulf War cease fire (which, by the way, went far beyond the rules of the treaties re: WMD) were worth enforcing, they were being enforced, with sanctions. Indeed, the sanctions worked-- Saddam didn't have WMD.
In any event, rules on WMD are not, in fact, enforced consistently. Israel, of course, is an obvious example. I don't particularly mind that they have a nuclear arsenal, but they certainly haven't faced a serious sanction for having one. Neither has India or Pakistan (though there have been some mild and inconsistent sanctions). And if war is your only acceptable sanction, we aren't going to war with North Korea. So saying we "had" to enforce international law with war against Iraq begs the question of why Iraq was different from all these other places where we didn't and won't go to war.
With respect to your laundry list of interventions, we didn't get into World War II or Korea to overthrow a dictator (and indeed, we left 2 dictatorships, including one of the worst dictatorships in history, in power at the end of Korea) or with any humanitarian purpose. Korea was about checking communism, and WW2 was a response to a direct attack against US territory and attacks on our closest allies. Bosnia was a low-cost humanitarian mission-- as I noted in my post, intervention can be justified when we actually can accomplish something at low cost (though even the Balkans are more fouled up than one might think).
As for your remaining examples, they prove my point. US involvement in World War I didn't solve anything and paved the way for the Nazis. Vietnam was an absolute disaster in which 58,000 Americans and 1,000,000 Vietnamese died to accomplish nothing. Afghanistan in the 1980's built the infrastructure for Al Qaeda and 9/11. "Doing nothing" was better than "doing something" in each of those cases, even if we assume some humanitarian premise for the interventions (and, of course, we were hardly fighting on the side of the angels in any of those conflicts).
What your domestic example misses is whether the neighbor, by intervening, will cause unintended and worse consequences by doing so, and whether the neighbor has enough resources to intervene. If such consequences may occur and may take more lives, of if the neighbor doesn't have the resources to intervene, the calculus is very different.
bagoh:
What if the gang will respond to any attempt at intervention by killing everyone in the town? Does that change your argument as to whether someone should intervene?
As for Iraq, you are begging the question. Whether or not we are improving things in Iraq is not a closed question. We caused a lot of problems, killed a lot of people, and opened up sectarian conflicts that had been bottled up. We also opened up our own torture chambers. And we've made a mess that probably can't be repaired for 50 years. Plus, 4,000 brave Americans have been taken from their families and loved ones due to the decision to go to war.
So singing the praises of humanitarianism and American exceptionalism is unjustified if it is done without reference to the realities on the ground. The Iraq War certainly wasn't planned as an humanitarian intervention, and it wasn't executed as one. One shouldn't pretend any different.
richard noggin:
Look, Hitchens is right that we made Saddam who he was. But that argument proves too much, because the logical conclusion is that since we have intervened too much and in too many places and with too lousy a result in the past, that justifies and compels us to intervene way too much and in way too many places in the future.
Instead, we have to stop the cycle. And a major part of this is to stop assuming that we are the world's policeman and we must intervene any time bad things are happening around the world.
And no, I have not missed Hitchens' point. Hitchens, despite mentioning the prior US support of the Baath Party, is, in invoking Berkeley, trashing those who argue for anything other than maximal US military action by saying that they are callous and don't care about the suffering in the world. He is saying that ultimately, we have a responsibility to intervene when bad things are happening whether or not we caused it, because anyone who says that we shouldn't be responsible for such things is being inhumane.