Board Thread:Skyrim/@comment-110.168.240.168-20140424104245/@comment-1470368-20160203140351

I think that's settled. All points in favor of sparing Paarthurnax make a whole lot more sense than any reason for killing him.

Not to mention that any reason for the Dragonborn to kill Paarthy would turn out to be hypocritical or nonsensical.