Clearly they believe that we are so incredibly stupid and gullible (and granted, some folks are) as to believe this enormous load of bullshit. This has nothing to do with security, safety, or any of the other fairy tales we are being told about why Gov-Corp is in every nook and cranny of everyone's personal business. And why they are blatantly violating the constitutional rights of all Americans, and violating the privacy of people worldwide. This is about power and control. Period.
To get an idea of just how far this massive intrusion has gone, read what Snowden says to Brazilians: "Today, if you carry a cell phone in Sao Paolo, the NSA can and does keep track of your location: they do this 5 billion times a day to people around the world. When someone in Florianopolis visits a website, the NSA keeps a record of when it happened and what you did there. If a mother in Porto Alegre calls her son to wish him luck on his university exam, NSA can keep that call log for five years or more. They even keep track of who is having an affair or looking at pornography, in case they need to damage their target's reputation."
This is not justifiable by any stretch of any measure. Read the rest of what Snowden wrote here.