Why use this language? Fake news is this specific double speak created by Trump which has a different but related meaning to the words generally. Fine, but I d

Why use this language? Fake news is this specific double speak created by Trump which has a different but related meaning to the words generally. Fine, but I don't understand why so many people who he is attacking choose to legitimize this usage by parroting him at their own expense. Note: Im not taking about the OP here, just Americans and American institutions generally