I don't know how to blend this in exactly, but I think it is the evolution of abortion. Pre born babies are not humans, just a "nonviable tissue mass". That makes it easy to kill them. Terri was not human, she was "brain dead". That makes it easy to kill them without the public being to concerned. That is the purpose of lies. The media got caught up supporting abortion. It would be an admittance of quilt if they did not continue their support to kill other innocent people.
Boy, this is depressing to think about.
Evil doesn't sell. Therefore, if you set out to do evil, you distort the language in order to deceive -- to make it sound as if you're doing good. You can give good names to horrible things ("choice," for instance). Or, you can talk up some little bit of good while keeping silent about the larger evils. It IS depressing. A very old trick, observed and told by many writers and thinkers before us. Old? Cain tried to deceive God about slaying Abel!
The antidote -- my favorite, at least -- is to cut through the euphemisms and describe things in plain, honest words. Then there is no place for evil to hide.