I'm always a bit bemused by the unspoken assumption that the US can do anything it wants, any time, and so all complex things are really easy &he US should always do them perfectly (as the commentator sees perfect). What a childish (literally) assumption!
What happened yesterday was not epeditive justice, at least not as the intent of the US forces. What happened was a military encounter with defeated generals who, having commited known atrocities in the past, tried to kill a few more people before their own deaths.
Reports are that the 7 or 8 people in that villa had barricaded themselves in a heavily armed / heavily armored / pre-prepared room, refused any overtures to talk or surrender and initiated a very heavy barrage of small arms fire at the party that first approached the villa. Interviews with Iraqis who live in the neighborhood corroborate that account. In my opinion, based on limited facts but on a fair degree of familiarity with both military history and tactics, the chances that these men COULD have been taken alive were very small. Just how many Iraqi and American lives should have been lost to their indiscriminate barrage of bullets on the slight chance they could a) BE taken alive after, say, a long seige and b) actually provide any useful information?