Why has religion been the reason for so many wars?

Sri Sri Ravi Shankar Guruji speaks on why religion has been the reason for so many wars:
 
Even I wonder about it. There are 10 major religions in the world: four from the Middle East and six from the Far East. The six religions from the Far East never had any conflicts. There was no war between these six religions. Hinduism, Buddhism, Sikhism, Jainism, Shintoism and Taoism – they all coexisted.

When President Nixon went to Japan, he had a Shinto priest on one side and a Buddhist priest on the other side. He asked the Shinto priest: What is the percentage of Shintos in Japan? The priest said: 80 percent. Then he turned to the Buddhist priest and asked him: What is the percentage of Buddhists in Japan? He said: 80 percent. Nixon was perplexed as to how this was possible. Shintos go to Buddhist temples and Buddhists go to Shinto temples. Similarly, Hindus go to Sikh gurudwaras and Sikhs go to Hindu temples. The same may be said of Hindus and Buddhists in India. Similarly in China, there is no war between Taoists and Buddhists.

The four religions in the Middle East were always at war. I think they should learn how to co-exist from the other six. Judaism and Christianity are friendly. Judaism and Islam have an issue.