I don't know much about this source, but they've pointed out something...interesting. Basically, Graham and Pompeo are slowly backing away from "We had to assassinate that guy, because he was about to murder a bunch of Americans" towards "We had to assassinate that guy, because it was the right thing to do". In other words, the same vague blanket answer a D&D character would give before pledging his pencil-and-paper life to rescue virtual orphans of an imaginary village on fire.
If "it was the right thing to do" sounds familiar, it should.
Here's a video of Dick Cheney using it to justify the Iraq War in 2014, long after we knew all of the reasons W gave for the war were bullshit. "It was the right thing to do" is not the inpenetrable defense you think it is, guys, especially when just to justify murder. (Yes, you can murder evil people, it's still murder)