Why do athiest' care?
I have a question for all atheist'. What is the point in your life without a higher power? I don't mean it as an insult, but as a sincere question. What is the point in arguing against a religion that you believe is just as fictional as harry potter or star wars? Why do you care if a televangelist takes an old lady's social security check? If we all are here by chance, or whatever you want to call it, then who cares what anyone does? In a million years none of us will exist, there will not even be a memory of an old lady or her money. If only the physical exists, then the past does not exist. Your memories are just information stored in the grey matter encased in your skull. Anything anyone did yesterday, good or bad, means absolutely nothing today, because even those affected by it will soon cease to exist and the memory will be deleted and there will be no reward or justice of any kind.
If you are right, then there is absolutely no reason to even try to behave with any kind of morality, because its completely relative. If a man feels good about forcing himself on a woman, then who can tell him that is wrong? He is just a walking, talking assemblage of meat and bone, interacting with another assemblage. Why would it matter what kind of interaction takes place? If a man believes that he should murder a million people because it is right to him, then who are you to say it is immoral? It would only be immoral to you and the morals that you chose for yourself, not to him and the morals he chose.
If I say it is wrong to be homosexual, the typical question I get is; who am I to make that judgement call? Well I pose the same question, according to you there is no higher power or authority, so what drives you to do right? And furthermore what gives you the right to distinguish right from wrong? How is murdering a human any different than murdering a fly? Both are moving, thinking organisms that evolved from lesser ones, neither has a greater destiny or purpose. Why is punching a person different from punching a rock, both cause a reaction in an object, both cause physical pain, and neither will have any impact on the great scheme of things, mainly because according to you there is no great scheme.
The easy answer is that you do the right thing because it comes natural to most people, or because you love others and want to give them happy meaningful lives, sounds great, except that violence and anger comes naturally to a lot of people and you call that wrong, and love is just an abstract idea used to describe co-dependance and attachment. You could treat a rock respectfully and compassionately for a hundred years, but it means nothing because there is no greater reward or justice. If you are right, humans are just as meaningless as rocks. If you are right, and we are all just pieces of meat and all we have to look forward to is 60 or 70 years of meaningless pursuits, you should be grieving, not bragging.
So put very simply, what is the point in trying to maintain any semblance of humanity if nothing comes after this life?