There's a lot of bullsh*t there. I am an atheist, but only by the definition of the god squad. I don't deny there there is a god, because I don't know--but I don't believe it. I consider that the burden of proof is on whoever makes a claim, but it's no big deal to me. I understand that a great many people believe that there is a god, perhaps most people. So long as they don't bother me, I'm cool with that.
I am what is called a weak or implicit atheist
. Most surveys which I have seen speculate that that type of atheist is the most common, but given that implicit atheists generally don't take such surveys, no one is sure. It is the so-called strong or explicit atheists--those who assert that there is not god--who cause most of the trouble that atheists experience, because the god squad attribute their aggressive manner to all atheists. Once again, I don't know if there is a god, I don't believe there is because I consider the proposition preposterous, and more importantly I don't care
While it is true that atheists (and many theists) attribute wars to religion, it is not always the case. In some cases, religion is just a casus belli
, an excuse for war. In some cases, the original cause is overtaken by pragmatic politics and plain old greed. So, as an example, the Albigensian Crusade against the Cathars only got off the ground in the early 13th century, because Pope Innocent III was canny enough to declare that the lands of all Cathar lords were forfeit, and could be seized by those taking the cross in the Crusade. Prior to that, no one in France (Languedoc in the south of what is now France was then under the nominal control of the King of Aragon) gave a rat's ass about the Cathars. It took simple greed to get the Franks involved.
The so-called Thirty Years War (which was several wars, none of which lasted 30 years) was ostensibly about religion. It started with a rebellion of Protestants in Bohemia, who were part of the Catholic Holy Roman Empire. But in 1630, King Gustav II Adolf landed in northern Germany, and turned the war around. Eventually, Cardinal Richelieu, who was effectively the ruler of France, would pay Protestant Sweden huge subsidies to stay in the war against the Catholic Imperialists. He considered a powerful empire to be a bigger threat to French interests than Protestants were. Obviously, the Wars of the Reformation, which had begun about a century earlier, were about religion, from start to finish.
History and society just aren't that simple. Most wars, overwhelmingly the majority, are about power and money, which are often indistinguishable, no matter what cause is alleged. Most human "evils" arise from personal cupidity or poor mental health. It is just as stupid to blame religion for the world's ills as it is to blame irreligion.