Why were the Shia Muslims angry with the Sunni Muslims after the death of Muhammed?

After the death of Prophet Muhammed, Muslims had a disagreement. Sunnis believed that Muhammed's successor should be Abu Bakr and Omar, and the Shias believed that his successor should be Ali.

Explanation: The main conflict between them -

   Though the two main sects within Islam, Sunni and Shia, agree on most of the fundamental beliefs and practices of Islam, a bitter split between the two goes back some 14 centuries. The divide originated with a dispute over who should succeed the Prophet Muhammad as leader of the Islamic faith he introduced

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.