What is reason behind the Shia and Sunni conflict?

It can be relevant to some limited Islamic groups and likewise the endeavor of the enemies of Islam to ... to make conflicts between them to weaken Islam ... As general info. read more

To be frank with you, the main conflict between Shia and Sunni dates back to the time when Prophet Mihammad (P.B.U.H.) explicitly and clearly designated Imam Ali as his first successor but after Prophet’s death, some guys disobeyed Prophet’s testament and chose Abubikr. read more

The reason for the schism between Shia and Sunni is that after the death of the Prophet Muhammad (pbuh) some Muslims thought that his cousin Ali bin Abu Talib should inherit the Prophets position as spiritual and political leader of Islam, while others thought that his father-in-law Abdullah ibn Abi Qhuhafah would be more deserving of the job. read more

In short: Shia believe that leadership should be passed through a blood-line from the prophet and Sunni believe leadership has nothing to do with blood lineage and should be based on the qualifications of a leader. read more