I would disagree with this to an extent because the moment that tailgate got too close to a member of congress, they dump a mine’s worth of lead into a woman.

That wasn't the DC Police, that was the US Capitol Police. IDK if it matters, but different departments with different focuses.

I don't think the cops understood that the mob would turn on them. They really believed the back the blue shit. But then I have no idea what was happening on the ground vs what was being decided at the strategic level, what level of cooperation there was between departments, and who might have got hung out to dry for plausible deniability.