I am confused by the use of the term dog whistle in this context. Can you point out the dog whistles in the GP post?

Common pejorative terms used by the right to whip up anger on their side against opponents:

"activists" as a slur.

"pushing ... agendas" for those seeking change (see for instance the famous "gay agenda").

"authoritarian" for anything vaguely regulatory.

TBH these aren't dog whistles anymore because everyone has heard them enough to know what is being implied.

These are differences in perspective. If you can't handle my disagreement with your imposition of regulation on my life, then you are the overbearing lack of evidence I fundamentally disagree with.