The state isn’t responsible for wars and neither is religion. It is people who commit theses atrocities
We can also turn this around: The state isn't responsible for good deeds and neither is religion. It is people who commit them. That's the problem with religions: they deny responsibility for all the bad stuff yet insist that good things can only be the result of faith...
Btw, the 'abuse' of religion to justify war would already be a good reason to get rid of it altogether; at least it would mean that people who want to commit atrocities would have one less reason to hide behind...