What is the difference between the Shiite and the Sunni?

Muhammad was neither a Sunni nor a Shiite; rather, he was a monotheist Muslim. Jesus also was not a Catholic or anything else. Both were the slaves of Allah alone without a mediator. Jesus did not worship himself or his mother, and similarly, Muhammad did not worship himself, his daughter, or his son-in-law.

The emergence of diverse sects due to political problems or deviations from the right religion is possible and has nothing to do with the right, clear, and simple religion. In all cases, the word "Sunnah" means full compliance with the Prophet's methodology, whereas the word "Shia" means a group of people who deviated from the methodology adopted by the majority of Muslims. Therefore, the Sunnis are followers of the Prophet's methodology and the ones on the right course in general, while the Shiites represent the sect that deviated from the right course of Islam.

{Those who have made divisions in their religion and turned into factions, you have nothing to do with them. Their case rests with Allah alone; He will inform them of what they used to do.} [169] Surat al-An‘ām: 159.