Google has taken away freedom from it's users to do as they want with their data (i.e. transfer it unidirectionally to Facebook). This is a fact.
So we have a clear example of Google choosing to control users data when it suits them. They claim they are doing this to try to force Facebook to become more open and that they are doing it on behalf of the users, but does anyone seriously think that's the only reason behind this decision?
Google has stated that they want access to Facebook's social graph and that they'll find a way to get it even if it's not through being granted access by Facebook. They obviously want this for competitive reasons, and to pretend that this isn't part of their motivation seems disingenuous to me.
And that's why this isn't as clear-cut as it seems. I personally think it would be good for users if Facebook's API did expose the social graph, but isn't it hypocrisy of Google to claim they are different while at the very same time holding user-data hostage?
The ends do not justify the means, particularly if the means are compromising the very principles you claim to uphold.
If open truly always wins, they wouldn't need to try to force Facebook to open up under terms dictated by Google. Google opens up data at their own pace - why shouldn't Facebook do the same?