Yes, most certainly. I've repeatedly seen posters try to elaborate as to how Religion itself is inherently bad. Usually using logic like this:
Which is wrong. If you're going to cite historical precedent than try to actually know history. Let me elaborate, and in the process try to debunk one of the most common Atheist arguments against religion.
The crusades are the most frequently cited episode of Religiously founded war. I could go into why that's a drastic oversimplification, but I'm going to try and provide a different counterpoint. That point is this: Crusades have been fought for wholly secular reasons, despite them having the fervor and moral justification that is most often associated with the Crusades.
I present to you the case of the French Revolutionary Wars.
Now immediately this seems like an odd case, especially since these wars started after the radicalization of the Revolution and the increasing frequency of attacks against Religion and the clergy by the Revolution. But it is one of the best cases of Secular reasons for tremendous irrationality and tremendous brutality. While in 1790 the National Assembly had sworn never to wage a war of aggression, increasingly in 1791 they were moving more and more towards aggressive war. In fact, in 1792 they did just that, launching wars of aggression around Europe. The rhetoric of the Deputies (members of the Assembly) took on a distinctly religious tone, the best example being writing and oratory of Jacques Pierre Brissot:
Brissot calls Religion "superstition" (a word used for religion by atheists on these forums and indeed in this very thread) and in the same breath calls for a holy crusade against tyranny. The French used their cause of Liberty to justify the extermination and inhuman treatment of their enemies:
Jacques Pierre Brissot on December 30, 1791 posted:
The National Convention endorsed this when it issued a decree forbidding French commanders from giving quarter to English soldiers.
Bertrand Barère in 1794 posted:
These men, men of the Enlightenment, men who considered themselves rational and above the excesses of Religion, were in fact falling prey to the ones most commonly railed against. The argument and prevailing Atheist philosophy that Religion is unique in it's ability to drive peoples to bigotry and hatred falls apart when faced with evidence like this. These men believed in a very real, very secular idea. That the peoples of the world should be free from the tyranny of forced faith and the tyranny of kings. This secular idea drove them to the same extremes that are so commonly exemplified when Atheists attack religion on that basis.