I agree XENOPHONZ that the truth does matter, and matters a lot.
The propaganda you refer to is still alive and well.
The "truth" that the basis for the invasion of Iraq (WMD) was false, gets all swallowed up in the rhetoric of "war against terrorism", (underlying truth) even though there is no connection between the two.
So many long-held liberties have been swept away by this "underlying truth", and I guess there's more to come.