An inconvenient truth?

It is repeatedly used as an argument by those defending the FRA legislation that the FRA are only going to look at a small bit of the traffic - the bit that has to do with nasty evil terrorists... ignoring the fact that you can't find the bits you're interested in without looking through the rest.
(A good critique of the governments position as put in a letter to the Moderaterna membership is here... in Swedish)

It's hard to believe that they can't understand that looking through all international traffic constitues mass-surveillance - so you're left with the conclusion that they choose not to see it that way. A complicit deception.

In the comments to the post linked above I found this quote which I thought summed it all up rather well...

“If you tell a lie big enough and keep repeating it, people will eventually come to believe it. The lie can be maintained only for such time as the State can shield the people from the political, economic and/or military consequences of the lie. It thus becomes vitally important for the State to use all of its powers to repress dissent, for the truth is the mortal enemy of the lie, and thus by extension, the truth is the greatest enemy of the State.” Joseph Goebbels.

What was that about the FRA-law being needed to protect against external threats to the state?