Religion Cause War?

We hear everyday of different conflicting religions, different religions being persecuted and being treated differently than the mass population. Suicide bombings have been going on in Israel for a very long period of time because of these wars between different religions. Would we be better off without religion? Is it religion that causes these wars? Is the fact that there are soo many different religions the cause of these wars? If you ask me, I would say no. Religions do not even contradict eachother in their essence of having all humanity to funcion as one whole, in peace. Lets take a look at it this way. If every person followed the rules and principles of their own religions, there would be no more alcohol, drugs, use of weapons, adultry, racism, or prejudice. Those are only SOME of the things that all religions agree are 'immoral' and should not be included in daily activites. Why are all of these things still present? Why do we still have conflicting religions? I DONT KNOW, it doesn't add up. If religions don't say to use guns, alcohol, adultry, etc. then...why do people still do it? Clearly its humanities DEVIATION from religion that causes conflict, and not religion itself! It's the curruption that we add to religion that causes 'religion' to become impure. True? or not true? Add to the comments, tell me what you think.