There would still be wars even if there were no religion at all.
The oligarchy of banksters that prints our 'money' needs the people to constantly fight amongst themselves, so we don't fight against them--our real rulers and real enemy. Religion is only one tool used to divide the people, but there are others such as race, ethnicity (say Chinese vs Tibetan), ideology (be it 'capitalism' vs 'communism', or red state vs blue state). Actual war is only the most extreme expression of these attempts to divide.
The hate campaign against Muslims is the much hyped 'Clash of Civilizations' neocon devotees of Leo Strauss promoted to replace the Cold War. The people were getting uppity after the fall of communism, and were demanding a 'peace dividend', meaning more personal freedom, and reduced military spending, thus reduced profits for the military-industrial complex.
America's, and the world's, current nightmare was all kicked off by the inside job known as 9-11. Of course, if you want to justify massive debt and military spending, or just want an excuse to strip Americans of their Bill of Rights (via the Patriot Act, T.S.A., etc.) it's not a nightmare at all, but a dream come true.
Those idiots you refer to were men who sinned. They do not represent Jesus. "Religion" involves the rules of man, not of God. Death and sin are not from God. Death comes from sin and the fall of man. Jesus defeated sin and death at the cross. Christ came to give us life, but not just life - life in abundance.