I'm with Venters on the doubts as to whether he did it as the evidence, though quite persuasive, isn't exactly iron clad.
However, I don't think the people involved in releasing him truly thought about the diplomatic consequences and the back lash we're now getting from all sides. If it were in the George W days, the US would probably invade us or something. I dunno, it'll probably roll on for a few days and weeks and then most will forget about it.
I do wonder what would happen if his cancer went into remission though.