if there is any plague to christianity, i think it is attributed to the portion of christian act called forgiveness. if you talk to americans in combat hospitals - they treat insurgents with as much care as our own american soldiers. like the red cross. who speaks for people who are doing good in the world? nobody. only the bad.
sure there are bad decisions everywhere - but it's not only on the side of those who are religious. i think bad decision start with bad foundation. if you only out for yourself- who is going to benefit? only yourself. if you are from a foundation built upon Christ - you are taught to think outside of yourself.
i would even go so far as to say that as soon as people leave God out (as some sort of 1913 plague dealer) - they believe that their actions have NO consequences. to me, this is faulty reasoning. sure - you can do as you like. but ultimately, the truth will come out in the end. we are all responsible to God and for our actions. if you kill - you might be killed. if you wound someone - you'll be either hearing their screams all the rest of your life or somehow find God's grace. the only way, imo to heal battlewounds and scars is to become a christian. then, we find that our evil ways of war and hatred is wrong. and that goes for both sides of a 'religious' conflict. what if both sides suddenly put down their weapons - came to a peace talk with real ideas for settling things peacefully (which probably could have been done thousands of years ago if it weren't for our basic selfish natures) and conceeding on a few points.
unfortunately, i don't see peace happening within our lifetimes. our society and culture is based upon the very things that the bible says are cursed. IItim 3:1-5 'but realize this, that in the LAST days difficult times will come. for men will be lovers of self, lovers of money, boastful, arrogant, revilers, disobedient to parents, ungrateful, unholy, unloving, irreconcilable, malicious gossips, without self-control, brutal, haters of good, trecherous, reckless, conceited, lovers of pleasure rather than lovers of God; holding to a form of godliness, although they have denied its power....'