Why do people join gangs? The purpose of joining gangs is to feel they belong and needed. Some also wants statues , respect, among the community that is why they join gangs. What is the purpose or aim of this gang? The main purpose of MS-13 to protect Salvadoran immigrants from the others. Who are their enemies? Eg is there another gang or the police? Rivals of MS-13 are 18th Street Gang, Latin Kings Bloods Norteños and affiliated gangs What symbols does the gang have? Common symbols they tattooed on their body are include "MS", "Salvatrucha", the "Devil Horns", and the name of their clique.