If you believe that someone is acting in a way that is wrong do what you can to educate them. No one becomes a better person by being treated cruelly.
In the words of Flannery O'Connor. "When you are speaking to the deaf, you scream."
Here we go again....*sigh*
Telling people that they're wrong, isn't cruelty... no matter how "condemned" they may subjectively feel. Have you ever tried explaining to a homosexual to his face, that his entire way of life is just plain wrong and that everything he knows, loves, and cares about, needs to be utterly abandoned if he intends to follow the Christian way? If you've ever had that conversation, you know that no matter how kindly, gently, and sensitively you do it, the person is going to *feel* condemned. Until he makes the change... then, from the other side, he'll "get it" finally -- as I hope you someday do.
Exposing a public wrong, isn't cruelty either, it's a necessary corrective measure. If Warren receives a tidal wave of hard questions, he'll be forced to confront his policy and either change it, or (in the event that it's not the awful departure from truth that it now appears to be), to give the reasonable explanation to which the public is entitled.