The problem isn't that there wasn't a crime: it certainly looks like there was. I am outraged by parts of what I've read. The problem was that the system sought to legally justify it. The problem is that we changed the system so that a good portion of people believe there was no crime. If somebody is told by the system that there is no crime, we can't then go backwards in time and declare there was one. History shows us that such legal application is always more destructive to society than the original incident.
An important concept to understand is "criminalizing politics". That's when politicians, who rotate through office and are expected to spend most of their lives as private citizens, make decisions that could be criminal but do not involve personal gain.
We elect people to make hard choices that involve results that could be construed in other contexts as criminal, especially with respect to foreign policy. We always have.
I do not like any of this, but it's very important to understand that the problems here are systemic. A different president and VP were just as likely to make the same choices. Want to go back and try people for Japanese interment? All the rendition done prior to 2000? Assassinations and coups overseas? Spying on MLK? Such an emotional attitude is understandable, but you just can't continue a government like that. If the system was acting as best as it could, and it screws up? You fix it. You don't get the firing squads out. That's banana republic territory.
So let's fix the system so it doesn't happen again. If we want somebody to hang, start a nice show trial. But since folks were acting in good faith (which is more important than "just doing their jobs"), pardon them and let's move on. There is no justice to be had here. We need to learn. This is not the time to let emotional outrage lead us into hurting each other needlessly.