foreign intervention is a damned if ya do and damned if ya dont thing;

peace for our times led directly to WWII

OTOH, because the Deep State is essentially a corruptocracy, their perspective on when/where/how to intervene is corrupt in itself

even in the cases where intervention is "justified", there is blowback; our aid to Afgan rebels that went to Islamic terror groups, for example

In some cases, like Mexico, we are not dealing with a cordial or honest relation to begin with; their policy is to dump their human excess on us. Pushback to that policy is going to be uncordial by default ;>

every country has their own self-interest to consider (either via public choice or by dictator); while I understand Mexico's policy, it is harmful to our interests.

intervention has to be considered on a case by case basis, ever mindful of blowback; intervention does not always mean military use...you bring the right tool to the right job

there are hundreds of cultures in the world...precious few of them value liberty and individual rights

[edit - forgot to say that while I disagree on some of what you say, you make a compelling case!]