Argument that I don't think Atheists should use
When dealing with the arguments of apologists and other fundamentalists, one often feels the urge to appeal to the tragedies that religion has caused. They'll point to the Crusades, the Inquisition, the Holy Ways, and the Witch Hunts and say "See! Look at what you've done!"
Ever since, theists have replied with "Hitler, Stalin, Mao, etc, were all atheists! And they killed many more people than we did!" They'll point to Hitler being a big fan of Nietzsche and Social Darwinism, etc. Now, whether or not you actually believe that Hitler was an atheist (which is very questionable since Hitler spoke out against atheism), you should note the problem with this argument.
It's completely irrelevant.
I don't understand why atheists and theists spend so much time reminding them of all the things that were evil in the Bible or what horrible thing a secular community did. Any attempts to call religion or atheism bad because of the negative actions (death, discrimination, poverty, etc) is simply an appeal to the consequences. It's irrelevant. It doesn't matter that atheism might lead to deaths. It doesn't matter that Christianity might lead to holy wars. Well...it does matter, but it doesn't when you're arguing about whether or not the belief is true. So, until Christianity can be proven without a shadow of a doubt, I don't see the relevance in arguing about how useful it is.
Like Sam Harris said:
"There are three ways to argue about faith. 1) Argue that your religion is true, 2) Argue that your religion is useful, or 3) Argue that atheism is bad. Only 1 is valid."
It doesn't matter before we go anywhere, we should be deciding on whether or not Jesus can be verified. We have people like David Marshall who is going around saying that the New Testament isn't evil and that it is true. http://christthetao.homestead.com/articles.html
But, that's not important. It doesn't matter. We need to verify that it's true first. Something that hasn't been done without argumentation for decades.
Our job on this Earth, is to take care of each other. Something that we have ultimately failed at doing, hence why we are so miserable.