system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Whats the difference between Sunni and Shia in Islam?
gpt
After the prophet Muhammed died, Muslim people had to decide who should lead them.  Some thought the most qualified among them should be chosen by the faithful, others thought that god had decreed that it should be a family member.  The former came to be know as Sunnis, who felt Abu Akbr should lead muslims, the latter came to be know as Shias, who thought Ali should lead.

In modern times, Shias give more authority to their clerics to interpret the Koran and lead the faithful, while Sunnis emphasize a more personal connection.  It that sense, Shias are more similar to Catholics while Sunnis have more in common with protestants.