Reasons for Violence

It is astonishing what reasons one Homo sapiens puts forward to use violence against another Homo sapiens. There is how one calls god (Christian vs Muslim vs Hindu vs Jews vs ...), but also down to the very details of how one interprets the same religious text (sunni vs shiites; protestant vs catholic..). There are colour of skin, or of hair, language, if someone earns a living with livestock or with agriculture (Darfur), what kind of human one is attracted to (hetero vs homosexuality), geographic origin (especially in neighbouring regions), what kind of sports team one favours, gender (male vs female), ... and some of the worst conflicts are based on differences between people that are so similar, that even modern science struggles to find out what these differences actually are, apart from the name of the group (Hutu vs Tutsi).
Differences between humans are simple pretexts, rather than true reasons, for violence.