OP, you’re combining two emotionally charged issues in one scenario, above:
1) no-knock warrants, and;
2) 2A “prior restraint” of the right to bear arms.
This isn’t the “can plinking” forum. We live this stuff. You, me and everyone here shares the deepest pursuit and admiration of the finer points of firearms. Matches become regular and free time becomes preparing for matches. This lifestyle goes WAY beyond merely being able to protect our families. I’ve gladly paid taxes yearly into the public coffers for 2/3 of my life so far, with zero public charge on my own account, to pay those in our institutions to maintain our values.
So you bet, there isn’t much I can conceive of more horrific than a frivolous taking, even temporarily, of my firearms by those same institutions.
This is the real deal on predawn no-knock warrants. They have nothing to do with private firearm confiscation. “Older” men like Roger Stone and Paul Manafort famously got this treatment recently for white collar offenses and they likely don’t even have a gun. Watch COPS. Yes, it’s ridiculous many times. A flagrant muscle flex in front of the mirror by law enforcement. Let’s not discover how bad this is only when it might be coming our way.
And on point two, - EL PASO - I see three choices but not very many talkative gun owners:
1) pay for 24-7-31-365 suburban-cop surveillance and tailing of every apparently deranged, man-boy who posts a picture of National Forrest high-risk-of-fire-today sign, and whose mother is told by the Allen, Texas PD that yep, her son can have that AK-47 despite her fears, thanks for calling though;
2) confront him and similarly threatening people and either deal with them or the weapon as appropriate case by case;
3) accept that in a country this large incidents will arise and hope that an armed public catches them in starting the act.
I’ll say that as a country, we don’t have the money to make number 1 effective, especially when the pranksters realize what havoc they could wreak by dropping bread crumbs.
So number 2, well that’s ok of course in airports and if the potus is invoked, but otherwise everyone wants the right to be subversive and skirt the line free of having to explain themselves, because we have the Constitution.
Number 3. That’s what it comes down to. We need to be intellectually honest enough to look at each other and admit this treasured right is worth some inherent degree of risk, to ourselves and our non-armed kin, and it is. And by all means, if we are going to rightly insist on having this liberty to bear arms, we owe a duty of vigilance to look out for the lives of those of us who live under our right to bear arms, but who do not, even the ones who oppose us.