The US has been playing the sap for Mexico for so long that Mexico is becoming complacent, not expecting any pushback because of the soft, cooing noises coming out of DC. It wouldn’t surprise me that, at some point, Joe US Citizen(s) is going to take the issue up personally and directly with one or more Mexican diplomats.
I think the drug cartels have bought off the INS or whatever it goes by now. There has to be some reason why we are opening the floodgates on the southern border. Cloward Piven maybe. You can’t have open borders and a welfare state. The Mexican gov’t is complicit in the fiasco. There is no reason that they should not take orders from the US gov’t.