You grasp an important truth: that we all are front line soldiers in the current Culture War. Everyday conversational norms have been co-opted by the radical left. Each of us can make a big difference. Freepers: don't let things slide, call 'em on it. Stay calm, put logic over emotion.
One of my recent favorites in small conversational groups is to reply to a blatant liberal: "you are too intellegent to hold such emotional opinions". They bristle at this, but they walk away in deep thought.