Earlier quoted context omitted.
I personally don't think that's the whole story. They're likely going to act against the cartels to take out cross-border drone capabilities and are preparing for S-A retaliation as well.
A cartel using a SAM against a US civilian aircraft would massively solidify public opinion against them just like 9/11 or the Iran hostage crisis. The US has been trying to extent the "foreign terrorist" label and casus belli to drug activities forever to justify military operations (ex. the "arrest" of Maduro was for drugs, not oil/Cuba/political stuff). That would be a massive self-own on the cartels part. (And if…
But then again this time seems different, laws aren’t followed or upheld. Human rights are a fleeting staple.