The mass media has lost credible Litzy among many A,Erica she. These particular A,ericans feel ignored, alienated and afraid. They have seen their manufacturing jobs go away through outsourcing, off shoring and automation. These are forces beyond their control. Naturally looking for a scapegoat, their fears and suspicions have landed squarely upon mass media. Consequently, they are eager to heap scorn, susion and ridicule on the media boogeyman.
Right wing pundits have bolstered their fear of the media by claiming the media does not supply them with truth, but inculcation. These pundits claim that the propaganda they deal with is, indeed, the truth the public does not receive from mass media. And the cycle is repeatedly fed.
Donald Trump is a man of massive yet fragile ego. Before even one vote was cast, he claimed election fraud. Even as he was sworn in, he claims election fraud on a massive scale. Donald Trump does not accept criticism lightly. His ego will not harbor any of that. He uses the bully pulpit of the Presidency to swing at every pitch, from celebrities to private individuals, Donald will punch down, never up to preserve the delusion that he has a total popular mandate to act with impunity.
Combine the fearful, suspicious members of the general public with a leader who feeds their fears and we get a casual relationship with the truth. Alternative facts is yet another way to lie in order to have your own outlook reenforced rather than challenged, sustained rather than widened and confirmed rather than questioned.