I sincerely doubt his claim that he's familiar with the content of all the documents, given the sheer volume, but even if we take his assertion at face value some of the releases have clearly exceeded the scope of constitutional abuses. For instance, data monitoring in Europe, South America, Asia, etc. have a firm basis in law and are basically the entire reason the NSA exists. You may view it as unethical or immoral, but they clearly aren't unconstitutional.

It's fine to disagree with this, but it's an arguable point and it's stuff like that most of us Snowden non-supporters take issue with, not PRISM or XKEYSCORE which are clearly unconstitutional.