I did enjoy the joke about how the memo defines "al Qaeda number two" broadly enough to be an ethnic group.
I will say that internally, people bristle at the notion that their targeting work is haphazard or reckless or sloppy or that they are heartless. You can learn a lot about a person by tracking them for months or even years, and even when you know the things they've done or plan to do, it is no small thing to hear their wife and kids crying and confused when they get the news. It wrecks some people.
I am sympathetic to both sides and agree with the opinion that the technology of war has outpaced the ethics of war, even while being unsure whether there are or ever were concrete ethics or just moral facades for one side to rationalize and the other to exploit.