What causes people to fight over religion?

People seem to fight over religion for about the same reason they fight over most things: to try to prove who is "right" and who is "wrong." And since most people feel very strongly about religion for one reason or another

there may be more and/or more intense fights over religion than over most other subjects.

Another thing that adds fuel to the fights over religion is that there's no real way to prove who is right or wrong

without referring to religious texts or church doctrine. (For example, those who claim that the Bible "proves" that their religion is "right" generally base their claim on either the Bible itself or their church's doctrine.)

Sometimes

government or churches feel so strongly about their religion that they are moved to wage "religious" war on "non-believers."

Religion is nominally the cause for many wars both past and present,

but that's a different phenomenon than a fight between individuals or small groups over religion.

Read more: What causes people to fight over religion? Answerbag