How do people in Alabama decide to root for Alabama or Auburn
Same way people in Louisville Kentucky pick to root for Louisville or Kentucky. Usually their family grew up choosing a side or when they get in a relationship that person has a favorite or they went to one of the schools.
Whoever you think is better I suppose :)
There is no rhyme or reason to why people root for a certain team. Maybe you grew up there, or went to school there. It is just preference to the person who is rooting for their team.
Because Alabama is the better of the two teams! Duh!