Using the military as border guards is managerial foolishness. You must have a very low regard for our professional military personnel.
We don't have enough soldiers now to have normal rotations in Iraq. Every budgeted slot in the military exists because there is a need for a person in that slot.
If someone said "Let's use teachers and firemen to guard the border", wouldn't you immediately ask who would teach school and put out fires? Why do you assume that our military personnel are any less necessary in the jobs they are currently performing?
Besides, there aren't enough men and women in all our armed forces to seal the borders.
Quite the opposite, I've got a very high regard for their ability to take on whatever mission is requested of them and do it well. And judging by the hostility in your post you're also quite aware they will succeed in keeping illegals out, which is definitely not part of your agenda.
That's the favorite strawman of those who say we shouldn't even try.
We don't need to seal the borders airtight. We just need to signficantly increase the risk of apprehension - to where fewer people are willing to fork over a thousand bucks to a coyote if there is a better-than even-money chance they will get caught.
Next, couple that with more aggressive inland enforcement. And especially make it riskier for employers to hire illegals so that lots fewer do. And cut off illegals from government benefits and schools.
Yeah, some will still come across. But we could probably cut the flow by at least half and probably more if we layer the approach.
If they were given orders to shoot to kill I'll bet illegals would stop coming. And I would support any president who gave that order.
And yes I really mean it.