@BlackFamily- The vendettas between cartel members does happen but it was mainly between the Sinaloa Cartel bosses where the structure is organized horizontally, the other groups like La Familia etc. Knights Templar and other have personal beefs or disputes between organizational controle and power. It's a power move most of the time or sometimes.
Acknowledge, hence why I said some groups.
Sinaloa is known to have internal disputes but major vendettas don't really happen unless family is involved like with the Beltran Leyvas and Chapo Guzman organization. But the run of the mill sicario can't really act outside their control or parameters.
One of those run of the mill sicarios eventually did just that: Los Zetas. Like i said, Regardless of the group/association that criminals belong to their not immune to personal disputes which includes outside of criminal activities ( Daily life).
The reason Los Zetas left or became powerful enough to become independent is because the Gulf Cartel back then gave too much dominion over their activities or rackets. That's why the Gulf Cartel now limits the power of any criminal group or association or expertise of area into a single division or divisons,
