I would not walk across the street to hear any on that list perform. It ain’t country and it ain’t music. Stream 92.1 FM (KNBT) New Braunfels, Texas if you want to hear the real deal.
I think Country music started its downward spiral into liberalism when Johnny Cash started to emphasize "social justice" in the 60s. There was still some good, politically-incorrect music being produced during that era, notably Guy Drake's classic, Welfare Cadillac. Be sure to read the first comment on that YouTube link about Johnny Cash and the leftist songs he performed at the White House.