How Do You Tell a Suuni from a Shiite?
Truth be told, you don’t. Unless you happen to know when and how they pray, as Slate explains, it’s pretty darned tricky:
For the most part, you can’t tell a Shiite or a Sunni by how they look, talk, or dress. There are Shiite and Sunni regions and neighborhoods in Iraq, and members of small communities may know the religious affiliations of their neighbors.
This piece reminded me eerily of the Tutsi/Hutu divide in Rwanda.
Chris 
Farhana 
Allie