I feel like the interview was edited to make it seem that way. If you watch any of Snowden's other interviews and lectures, he's always very articulate and passionate about the subject.
It's fairly reasonable to care about privacy when it comes to sensitive topics like this. Maybe the OP isn't ready for people to know his identity yet.
You have a good point here, but I consider this perpetual struggle a matter of liberty vs. power, rather than security. True security actually encourages personal freedoms to an extent.
Right, you can never be 100% certain it's the same code. But it's a valuable "good faith" step that sets a level of trust between the users and developers.