I think you have an unrealistic expectation of the size and funding of the SS, but they also clearly have unrealistic expectations of the competency of cops (any) so maybe that's fair anyways.

Just wait, in a few months, they are going to become far more similar

...foreshadowing?

Then you ought to have someone remove him nonviolently, just to make sure he's not a threat. Maybe send a cop up there to instruct him to get down?

Cop is threatened with a gun

Okay at that point you'd expect a radio call to go out "Person on X roof just threatened a Law Enforcement officer with a gun" which I'd consider license to fire.

You'd think the counter-sniper would maybe keep his sights on the guy pulling out sniper equipment.

Especially when he pulls out a fucking rifle.

ACASS