Sure.
If we are going to go that route: there wouldn't be cartels in MX if it weren't for the U.S.' appetite for getting high; the beheadings and shootings happen among people in the drug trade. The kidnappings, if you are referring to the 4 who allegedly drove an old van from NC so a woman can get a cheap tummy tuck, there's more to it that meets the eye. There are traffickers and people who exploit migrants on both sides of the border.
And, I'll add, what happened in 2015, didn't help either.