I suspect a partial answer might be that many are not in their right minds, are under trained, and over motivated by bonus payments and past divorces.
What actions are you alleging qualifies as confronting? Be specific. Unless I have a wildly different definition of confronting, everything I've read and every video I've seen from different angles shows the opposite.
(This is setting aside the fact that having a concealed carry permit and carrying a legal firearm is not a death sentence in this country.)
Rights aren't rights if you don't get to actually use them.
Right now Americans are learning the lessons of the black panthers: constitutionally protected "rights" are only rights so long as your flexing of them isn't inconvenient to the State. We've been shouting this at McMilitias for decades now.
Not related to this situation, but in the city I live in, it's better to keep it on your person than in your car because kids are breaking into cars precisely because they know people from the suburbs visiting downtown might have one in their glove box.
Have you considered why? It's telling that you haven't answered my question: How exactly did the victim confront law enforcement?
I can't speak for everyone here but frankly, I find these "Would you do X?" questions irrelevant and I struggle to see a good faith reason for asking them. I can think of many bad faith reasons, for example shifting blame to the victim to remove focus from the border patrol agents' actions. Or a more charitable interpretation is you view this as a simple matter of cause and effect: if he didn't bring a gun he'd still be alive; or perhaps, if he stayed home altogether he'd still be alive. Is that your motivation for asking these questions?
Setting aside the fact that no, we don't know those things to be true, I don't think that interpretation of your intent is much better. But you also haven't been forthcoming with why you're placing so much importance on these questions.
You don’t see a problem with that?
What obstruction?
They walked up to him. You are lying by implication that he was obstructing shit unless you mean in the 30 seconds from being dogpiled to shot.
But setting all of that aside (which is a big aside), even if he was confronting them with his camera while armed, the whole bullshit shtick of the second amendment is that being armed should not be a crime much less a death sentence. He did not brandish his weapon or threaten law enforcement in any of the half dozen videos that have been released so far. To be even more clear as a citizen you are allegedly supposed to be protected from summary execution/judgement with or without the possession of a firearm, in many legal circles the possession of a firearm grants you more protections under the law not less.