I think all massacres is the final result of the load of the community.It s leaking inside the society and explode suddenly.
Rwanda Hutu-Tutsi problem.One tripe is minority but have more power than the rest of the majority.after some reasons majority killed the minority.or after that minorty killed majority.
Because of the people who doesnt know any idea about the region(French and Belgians) or for their benefit they ve dived the country and people bacame anmy.
Before french hand touch they werent kill each other.
Same has happened in Ottoman Empire.We were living with peace with greeks,armenians and serbians,bulgarians.
But Russians started a problem in the orthodox people (Bulgarians,Serbians,Greeks)and those people wanted the freedom.
Freedom brougth blood and tears to this lands but Russia become more rich and great country.
Greece became free after them all the others wanted same independence.They ve got all independence but this was the game of the other countries.
For more money dived a country (Ottoman Empire) but it brougth money for westerns but massacres or sadness for locals.