With the increasing legalization and availability of marijuana across this country, the Mexican cartels are focusing their efforts on the hard drugs such as cocaine and heroin, etc..
It's not worth the risk of getting caught smuggling a product across the border that's already being grown here.
The reason I thought they should be executed is that they were, in essence, bringing a death sentence to their customers. Alcohol and marijuana use don’t result in death by virtue, solely of you using them. You can, theoretically die of Alcohol abuse via drunk driving or downing an entire bottle of vodka, but it’s not the same as simply dying from normal use, which can happen with the hard stuff.
So I consider all dealers of such drugs to be murderers. Every single one of them.