Its more the implication that the unite states, which is a cartel in its own right can use that power to systematically execute people on the street as if it was a cartel attack making an example out of someone.
Thinking about it you could argue ICE already did that twice already, and you get considered a anti tech extremist if you call elon musk a retard on twitter. Its not too much of a stretch to imagine just how far this abuse of power could go.
And just to make sure im clear, I'm not making an argument America a scary dangerous place and Mexico is safe. I'm clarifiying what I think was the intent was.