By that logic, maybe we could have averted WWII by informing the Germans that their conduct was uncivil. If people don't already know that ripping a child from his mother's womb is "uncivil" then nothing you can possibly say will convince them. They simply don't care. The best we can hope for at this point is that we don't have to pay for it (and that's not looking good now that the "Affordable Care Act" has been forced upon us).
The contingencies of past silence do not excuse the obligation to speak up where there is wrong. I must agree - there are many people who do not care, even more than we. They are precisely the ones whose incivility ought be pointed out to their face and to the whole world. Testify to what is right and good. Go down with the Truth on your side.