'created /in/' is not equivalent to 'created /by/' or 'is a product of'.

MS-13 was literally founded in the US, in Los Angeles. Their rise to prominence (from small street gang to transnational one) was under the control of a man named Ernesto Deras, who had been trained by US Army Green Berets in Panama while serving in the Salvadorean Special Forces, and then left El Salvador and moved to the US to escape the brutal civil war in El Salvador- a civil war the US did have some involvement in. But MS-13 (and their rivals the 18th Calle) started in the US and then emigrated back to El Salvador.

Not everything, but to deny its role in shaping the world is unreasonable.

The War on Drugs is behind this mess. The cartel was born out of this, and MS-13 was a result of that, our "justice" system.

This doesn't make cartel or MS-13 members innocents, but it's not like they came from a vacuum.

Does that mean Americans deserve to be subject to the cartels and MS-13?

Nobody* deserves to be the subject of violence but at some point Americans need to take responsibility for creating (and continuing to create) the environment in which cartels can flourish.

When almost half the country can't even be bothered voting, much less stand up against crimes against humanity like forcibly and intentionally separating children from their parents (sometimes permanently) and locking them in cages, then frankly I think you lose the right to complain about the circumstances you find yourself in.

In other words, you can't take a shit on the kitchen counter and then complain about the smell.

Absolutely not! But MS-13 was literally founded in the US.