^^^ Very well said. It is apple and oranges and it's counterproductive. Remember Voltaire ("Think for yourselves and let others enjoy the privilege to do so too") and Evelyn Beatrice Hall's paraphrase of him ("I disapprove of what you say, but I will defend to the death your right to say it.")
It's also childish.
I prefer not to fight idiocy with immaturity -- it pulls me down to their level.
Besides, they'd probably welcome someone tearing up their crosses -- it just gets them more publicity.