I can guess how Karzai is reacting to Obama throwing a hissy fit over their failure to meet and then talking about larger discussions on Afghanistan’s future.
An engineering professor in college once told me there should be three good reasons for any unconventional (aircraft) design decision. I think the same mostly holds for politics as well... This was certainly an unpopular and unconventional decision, which begs the question, what were Obama’s ~three-ish reasons? I propose the following:
1) Get the VA scandal off the front page
2) Force Karzai’s hand to sign the security agreement he has thus far refused.
3) Begin the evacuation of Gitmo with the worst... Its easy from here.
4) Thumb his nose at the troops in the process... he traded 5 senior jihadis for one wannabe jihadi.