It's true that Facebook is not the US government, so perhaps we should be less hesitant about the claims they make. However, Facebook does have a history in this area that gives me some pause. Their former CSO was Max Kelly, who is ex-FBI, and would give talks about shit like the need for "uniting" military and commercial "cyber defense." So to the extent that we're dependent on Facebook's internal narrative to determine how they respond to the US government, my sense is that at Facebook, much of that narrative was set by someone who is largely sympathetic to government cooperation.
I think you're correct in pointing out that the NSA is ultimately to blame. However, I think we should acknowledge that while companies like Facebook obviously do not have malicious intent, they are still in the surveillance business. What they are building does have some inherent danger, and will continue to attract the interest of the US government, foreign governments, and attackers.
I'm in the camp that Senator Wyden asked the question in such a way because he knew what the answer was going into the thing.
At this point, you need to start looking at everyone as a suspect. It's an uncomfortable notion, we might not like it, but it's a reality pill ya gotta swallow.
Maybe it's the same thing all presidents learn their first couple of months in office. Maybe it's a memo that gets placed on the desk in the Oval Office by some shadowy figure. Whatever the case, the honeymoon is over, folks.
That's the problem with centralization, with representative democracy. A single point of failure is a bad idea. It's time for participatory/direct democracy.
Put another way, DNI lying != FB|Google|Apple|MSFT|Yahoo lying.
And to me, that's an important distinction: millions versus < 20,000. I might be persuaded that there existed a few thousand cases in those six months where law enforcement had legitimate reasons to get data from Facebook, for the types of criminal activity mentioned in this post from Facebook.
Either FB|Microsoft|Google|Yahoo|etc... are all lying, or Snowden didn't understand what he leaked. I'm betting the later.