Please break up your text so as to make that possible.
Are you missing something? Sure. You're missing the part that you're part of nature/evolution. Religion was invented by man as a means of defining right and wrong. It evolved. We no longer need it to project what's right or wrong, however.
Strawman, Godwins, etc.
You're missing one huge point. Humanity.
We're human, we have feelings of right and wrong. We feel compassion. We want to be good. More killings have been done in the name of religion than under any other cause, and I feel strongly enough about the lives of people I've never met that this annoys me.
On the flip side, using your argument, Religious people shouldn't care about the environment because God gave us this oil and put these trees here for us to use. We'll never run out because God will make sure of it. Global warming isn't a problem because God regulates the temperature, not the consumption of rotted dinosaurs (that never existed anyway) or our presence. Let's kill whales, endangered species and heathens as God put them there for us to use as we see fit.
See how easy it is to completely miss the point?
Atheists still care. We still hate cruelty to animals and people. The sooner you stop seeing us as Darwin-worshipers and stop treating Atheism as a religion, the sooner you'll understand us.