Just the other day in a conversation with a liberal about liberals "outing" gay republicans. Since I wasn't getting anywhere I posed this question: "If I call Charlie Rangel an uncle tom or throw oreos at him, what does that make me?" Her response was the obvious "racist", and she would be right. I then pointed out that democrats had done exactly that to Michael Steele. Her response: "Oh, well he's a republican." To her it was the most natural thing in the world.
I don't like to overuse the word "nazi" but when it comes to dehumanizing conservatives, some on the left have gone a long way down that road.