La Familia took root in the Michoacan (sp?) state after Calderon began his narco-war. For every cartel Calderon takes out another is going to take its place. The longer this narco-war continues, the weaker Calderon becomes.
The "War on Drugs" has been around since the 1970s--over 30 years. It is no closer to being won than in the 1970s--strongly suggesting that it can't be won. If it can't be won, here or in Mexico, the rational thing is to end it.
It may not be a politically palatable solution, but it is, I suspect, the inevitable one. It is the only solution left--or soon will be.