Dissent, disagreement, and debate are healthy and necessary for a functioning democracy.  It looks like President Trump is doing his best to homogenize public opinion to conform more closely to his own ill-informed thoughts by "revising" knowledge garnered by decades of study and inquiry. 
 
It appears that President Trump and his minions believe that they can create not only their own policies, separate and distinct from the previous administration, but that they can create their own facts as well.

Worse yet, they and their supporters are proud of their ignorance.