Why has Mexico allowed this to happen?
I don’t know but it’s costing them a fortune.
I doubt Mexico sees it as their problem. It isn't their country these criminals are trying to break into right now unless there are more doing it at their Southern border.
The way I see it; if someone is breaking into my home I have every right to blow their head off and would in a second. Why should these thieves be treated any different?
There is no simple and short answer.
Never expected any different.
Doesn’t matter either, not at this point anyway.
What mattes is our forceful and full throttled response.
Years ago, FReeper MeneMeneTekelUpHarsin wrote a good piece on the duplicity of the Mexican people.
They are allowing this to happen and IMO, are the ones coordinating everything.
They have not and have never been our ally or even a trading partner. They are the equivalent of North Korea to our South Korea, prior to 2018.