Everything is moral when the fight is against evil

I have written before that one cannot really make sense of American politics over the last 3 decades without appreciating Charles Krauthammer's observation that liberals believe that conservatives are evil. John at Power Line has a post that just has to be read. NARAL has put out an ad which is so slanderous that it leaves me almost speechless. How can liberals lie so blatantly? Have they no morals at all?

They think they are fighting against evil. Anything goes.