One of my all-time favorite shows is Babylon 5, and in one of the spin-offs Thirspace the plot describes the efforts by the Vorlons to discover a new dimension. In that they admit to a huge mistake, by opening the door not realizing what's waiting on the other side.

Good-will is like that, and a lot of our problems are sustained by good-doers - ignoring the fact that there is an army of opportunists and criminals behind every "charity" and "moral stance".

Cultural Marxism is propped by that army, walking through the gates basically unopposed, opened by these good-will morons.