It’s Boston PD policy for these guys to wear badges and cooperate with requests for their name. Of course, that would be losing a battle of the wills with a civilian, which these power-tripping thugs couldn’t bear. They aren’t there to protect and serve, they’re there to intimidate and harass.
And of course, it’s not like there is even one good cop to step up and say, “I will follow department policy, and we all should answer their questions.” They’re all on a power trip, and they’re all willing to stomp on department policy. Rather they stand idly by while they attempt to kick people off of a public sidewalk.