And it's 100% due to our nation's drug war.
Stated simply, we prohibit drugs by law but demand for them is still high. Prohibition raises prices above what they would be if drugs were legal. Thus, a group steps in to meet that demand because there is enormous profit to be made. The money is so significant the group will do whatever it takes to protect its profits.
Including cutting off people's heads.
Sorry about the graphic image. But you really should "see" what prohibition does to our neighbors to the south.