While it would be useful to establish constructive discourse with the left, the biggest problem in confronting them with facts is the mindless embrace of propaganda and lack of understanding that drives almost every aspect of their mouth frothing diatribes.
The mind numbing ignorance on their part is growing, not diminishing. I am more and more compelled to simply walk away. It's just not worth it to try to salvage some of them.
Primarily it is the total irrelevance of Facts. Facts, to a liberal, are merely a mental construct like any other fantasy.Facts are how things ARE, not how things SHOULD BE and therefore are to be ignored or attacked.