The police showing up acting like dirty harry and starting a big dick measuring contest is a pretty continuing theme ..... everywhere.
I will clarify why I don't blame them.
They were responding to a "suspicious man with a gun" call. In their mind it could have escalated to a armed robbery in progress by the time they got there.
I can see easily why they may have been "having a dick measuring contest".
Again, not even a remote reason to blame them.