I hope you feel better after releasing that bilge.
Is only a slightly more detailed version of your own comments on the same subject.
I would tell Mexico that if they get within 50? miles of our border we are sending in the Airborne followed up by the Marines.
This might get the Mexican military involved and you know the cartels will be firing on the troops at the least.
If they want a bloodbath so be it. Inside Mexico even better.
I am not sure what your criticism truly is about. I would actually like to avoid a "bloodbath".
It would be best if non-violent methods can be used to stop this invasion. They definitely should be tried first. If that does not work, then we really do need to get on a war footing quickly.
And as you pointed out, the Cartels will fire on American troops if they try to close the border. The response must be something more than a strongly-worded complaint. It will require our Army to destroy hostile forces across the Mexican border, and the Mexican Army and Police had better not get in the way.
Things escalate from there until one side or the other capitulates.
But if you don't want things to escalate, you must have overwhelming forces to back up your position and convince your enemies that you are willing to use them. Ironically, with that condition in place, you may never need to use your forces at all.