There are some 10,000 different religions, and followers of each are convinced that they possess the one truth.
As far as I’m concerned, the most interesting question about religion isn’t whether God exists but why so many people are religious. There are around 10,000 different religions, each of which is convinced that there’s only one Truth and that they alone possess it. Hating people with a different faith seems to be part of belief. Around the year 1500, the church reformer Martin Luther described Jews as a “brood of vipers.” Over the centuries the Christian hatred of the Jews led to pogroms and ultimately made the Holocaust possible. In 1947, over a million people were slaughtered when British India was partitioned into India for the Hindus and Pakistan for the Muslims. Nor has interfaith hatred diminished since then. Since the year 2000, 43 percent of civil wars have been of a religious nature.
Moar here.