Islam and Research Paper

My research will be about an interesting mystery that I came to think about when I was brainstorming. I want to find information and learn about the Sunni and shia. They are both groups of the same religion. They both share the Islamic religion and worship “Allah” as their god. My research paper will be about the relationship between the two groups. I have heard that the relations are not good at all and would like to know the cause of this. Even though both share the same religion. Also what interests me is the differences between the two religious groups,in their ways of worship,different believes, and different traditions they have. It is known throughout the world and history that both groups share a history of hatred and fighting between them. They have had many incidents and some types of battles in history. These incident were very big and caused the hatred and conflict to grow bigger every time. In a way it became a curse that was passed down from generation to generation,from the old to the new and so on. Both groups share the same religion but are very different, in many ways. They have different ways and views of life. Another is they both got distinction ways of worship,traditions and history. What people do not know in the world is that The division between Shia and Sunni dates back to the death of the Prophet Muhammad, and the question of who was to take over the leadership of the Muslim nation. This caused the inner conflict and split between the Muslims of the world. In this research I would like to find the answers for many questions and curiosity thoughts in my mind. In this research paper I would like to know what are the differences “in detail” between the two religious group? When at the same time they share the religion. Another thing I would strongly want to know is the reason 'in detail' and what happened? to cause this historic conflict and fighting through out history. Even until present day and time. Also while thinking about this