Looks like someone needs to spell it out for you guys.
The police are not and never have been required to respond to an emergency. SCOTUS has ruled on that several times. And I know that you guys currently love SCOTUS, so you won't bitch about their rulings.
I don't like the Coward of Broward any more than you, and I think he should be fired and segregated from normal life, along with the Uvalde police department. BUT that is not how the law is interpreted right now. Those cops had no legal requirement to do anything. So, while morally reprehensible , their actions are legal.
Respectfully, I think you are extrapolating a bit.
The ruling was that the police don't owe the general populace a duty to ensure safety, absent a special relationship. And it wasn't SCOTUS, it was the DC Court of Appeals.
Warren v. District of Columbia. What that means is the fact that Mayberry has Sheriff Andy and Deputy Barney on duty doesn't guarantee that you won't ever be attacked or held up.
But the coward of Broward was in a special relationship to the students. He was paid specifically to be there, on their campus, to protect them. Not only that, he DID respond -- whereupon he did ... nothing. I don't think the decision regarding their general duty to protect in any way applies