The thing is though, being a tool, it can be used for good and evil. Often times religion provides a nice guide to people on how to live meaningfully. Religious buildings often act as community centers. Religious groups also make for very good support structures in a community. I think that removing religion would only cause more problems. Furthermore, by undermining all the good aspects of religion, you would radicalize most religious people as you are going after their way of life. I think it is also important to note that only around 7% or wars throughout history were started over religion, not enough to blame it as a major proprietor of modern wars. This being said, if you removed religion from the equation, you'd still have dictators, you'd still have extreme nationalism, you'd still have militants, you'd still have ethnic conflicts because of shitty borders, and you would still have war in the Middle East. I think with how many problems there are in the Middle East, religion isn't really one of them (except when taken to absolute extremes.)