A pet peeve of mine is liberal Christians who make ridiculous accusations against fundamentalists. For example, this quote from Fred Clarke, posted a few days ago by James McGrath:
Anyone passingly familiar with fundamentalists knows that this is obviously false, as shown by the fact that fundamentalists, yes even fundamentalists, sometimes do admit they were wrong about something. That includes changing their mind about points of Biblical interpretation.
As someone who cares about the truth, I find the idea of people passing around such obvious falsehoods disturbing. Yes, fundamentalists are awful, but that fact doesn’t justify nonsense like this. In fact, it makes it unnecessary: by a wide margin, there’s enough wrong with fundamentalists that we don’t need to go around making stuff up about them.
ETA: I know I’ve seen many examples of this phenomenon, and I think I’ve even written about them before, but no other examples are coming to me at the moment. If you read this and knew exactly what I was talking about, feel free to share your own favorite examples in the comments.