(For what it's worth, I helped my family move cross-country by car in summer 2016; we passed a "border" checkpoint in New Mexico or so, on I-10 relatively far from the border, where they stopped each car, asked us if we were citizens, and let us go on our way when I answered yes. That seems like a much more "standard" experience than what's here.)
Part of it is denial of a lawyer. As I understand it, you might not have a right to deny the search, but you should still have access to counsel, because the point of legal representation is that they can tell you exactly what rights you do / don't have.
Part of it is an apparent government focus on Mozilla. Andreas Gal hasn't been at Mozilla for about four years, but that's what they asked him about. And there was the visa denial for Daniel Stenberg (author of curl) when heading to the Mozilla all-hands: https://daniel.haxx.se/blog/2018/07/28/administrative-purgat...
And finally, part of it is that it shouldn't be common. It's a good reason for individuals and companies to leave America.
You can consent to the search, but you don't need to. If you refuse consent and they lack probable cause, the evidence would be suppressed.
For more details: https://www.aclu.org/blog/immigrants-rights/immigrants-right...
He then tried to get us to say we had personal use amounts of drugs on us and he was only looking for massive amounts of narcotics(the "amount cartels have" according to him).
I was with a friend who was not a US citizen but is here legally on a work visa, they took his documents and left me alone while the dog ran through the truck.
And to be honest, do you really think I'm going to put up a fight when I haven't seen a shower in days and have a 7hr drive ahead of me?
We obviously fit a profile of sorts because the first words out of his mouth when we pulled up were to pull to the side because his dog indicated on us and he needed to search our car.
Again - nothing distinct about being near the border for that.
As you said, it's not objective whether the dog legitimately signaled. But IIUC you have limited ability to demonstrate that. (anyone know of cases around this?)
In other words:
The Fourth Amendment of the Constitution clearly states: "The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated unless a dog barks."
It’s important for people to know that such behavior is not the norm among civilized countries.