The mistake you're making, I think, is expecting Leftists to answer on principles. They don't give any indication of believing in principles. There are no good things and bad things, only people doing things to others and so you must understand who is doing what to whom.
So asking whether Obama did something wrong reads as a category error. Obama is good, thus things he does are good.
And likewise when Republicans do the exact same thing, it is bad because they are bad. There's no such thing as "principled behavior for everyone", there're only actions that help good people against bad people and actions that help bad people against good.
