Three thousand innocent people would still be alive today if Osama bin Laden were an atheist. He wouldn't have started a terrorist network that flew two airplanes into the World Trade Center, because atheists know that we only get one chance on this beautiful Earth, and the waste of even one human life is tragic.
If President Bush had been an atheist, 150,000 innocent civilians (mostly women and children in Iraq) who were killed by American bombs would instead be alive today. Bush wouldn't have responded to bin Laden's attack with irrational, hate-laced retribution, fueled by the "Jericho Complex" that says it's OK to murder innocent civilians, "men and women, young and old, including the oxen, the sheep, and the donkeys, slaughtering them all." (Joshua 6)
If American society was non-Christian and non-religious, we would not have put up with Bush/Cheney/Rumsfeld's immoral, holier-than-thou war against innocent Muslims in Iraq who never did anything to us. The majority of Americans would have quickly realized what the atheist minority saw all along, that it was all about oil and money, and that the Christianity-versus-Islam flames that were fanned by the Bush/Cheney/Rumsfeld triumvirate was nothing more than cynical manipulation of public opinion by evil men to achieve political/economic gain.
If the American Congress was full of elected atheist congressmen and senators, they would have quickly seen through the Bush/Cheney/Rumsfeld smokescreen. Instead of prayers on the Capitol steps, they would have worked with our military experts to devise a sensible, restrained campaign to root out the terrorists without killing ten times more civilians than terrorists.
Unlike some atheists, I don't blame all the world's evils on religion. Most wars, including Afghanistan and Iraq, are about money and power. But religion is used as a tool of war; without it, most wars couldn't be fought in the first place, because people would come to their senses and realize that we're all just humans, stuck here on this Earth together, and that life is too precious to waste.
The 9/11 attacks, and everything that followed, simply wouldn't have happened without religion to fuel the hatred on all sides.