Religion can be compared to norms and values in my opinion, which is indeed equal to the core of humanity. Maybe religion cannot be a direct blame for wars since religion is something personal for each individual, regardless of being Christian, Muslim or believing in anything else. But I do think that religion is used as an argument to start wars, especially by extremists such as the jihad.
The wars that have happened in the past and are still ongoing would still have happened if there was no religion, because the norms and values of the people are different. It's a really complicated question which couldn't be answered by a simple yes or no, well thats what 'I' think.
You just compared the holy books to a harry potter novel? You sir, are quite dumb
The context of those books are totally different.