Questions pertaining to interactions between Sh'ites and Sunni, and explicit differences of opinion between the two.
Shi'a and Sunni Islam have a long (and in many cases violent) history of conflict and difference of opinion. Questions under this tag would commonly be about either seminal schismatic events between Shi'ites and Sunnis (e.g. the Battle of Jamal) or for explaining major doctrinal differences between the two.
Relevant meta discussion: