As a European with a digital subscription to the NYT - how are they supposed to treat both parties equally?

The GOP, from my European point of view, seems to have completely abandoned any belief in science and civilized discussion and just spouts whatever appeals most to their base.

In my opinion in the age of Trump (arguably even before that), it has simply become impossible to treat both sides equally. And every time they try - see e.g. the article by Tom Cotton that they printed - it becomes glaringly obvious that it does not work.