Excellent analysis Derek.
The so called progressives (socialists, communists, Marxists, etc.) have always played a long term game with every trick available. They seek always small concessions knowing that multiple small concessions equal victory.
Every time conservatives compromise with the left, notice who actually compromises and who wins. The left never compromises.
The left have no integrity or principles, so they could compromise easily. They never do compromise their principles for the fiction of cooperation.
The right does have integrity and principles which should not be compromised, yet they do.