You're getting some "cut to the chase" style responses, but the actual supposed mandate of the Community Relations Service is to assist communities that are suffering escalating tension as a result of traumatic events in which race (or some other identity trait) plays a factor. The CRS's job, ostensibly, is to come in and settle things down - to lower the temperature - when some violent happening threatens to kickstart a wider racial conflict.

Of course, the CRS only does this when there is a violent attack by blacks or Muslims against whites. There was no attempt by the CRS to calm things down in the wake of George Floyd or Ahmaud Arbery or Michael Brown. Instead, officials permitted or even encouraged widespread racial unrest in those instances because they involved a white transgressor against a black "victim".

Instead, the CRS appears to reserve their efforts exclusively for those cases in which a black or Muslims aggressor harms white people. That's why you don't see consistent national news coverage of black on white violence. That's why government officials rush to declare black on white crimes as isolated incidents or the result of mental illness. That's why the families of white victims tell us not to use their lost parent or child as a catalyst for "further racial divide". The people in these situations have been coached by CRS to publicly address the event in a way that "minimizes further harm to the community" and avoids "inflaming racial tensions".

So in reality, the unwritten goal of CRS is to tamp down white anger in response to vicious attacks against whites by non-whites. It's a one-way initiative that does not try to corral or manage black anger when the circumstances are reversed. These people know that black on white violence is so routine and severe that it must be constantly obscured and spun in order to prevent whites from banding together and mobilizing politically or culturally. They also know that leftist political and cultural movements benefit from the unrest that results from white on black "violence", so that anger is either allowed or promoted.

It's worth noting, also, that the cases where CRS does nothing to stop unrest are usually along the lines of "white cop shoots black lifelong criminal who was violently resisting arrest" while the cases that prompt intense CRS action are more like "black man shoots five year old white child in the head for no reason". Obviously the latter requires an entire government agency to heavily influence (or coerce) local officials and family into complacency and forgiveness.

So that's the Community Relations Service. On paper, it's a good thing. In practice, it's hypocritical government bullshit operating on a consistent double standard in order to prevent white people from losing their patience while enabling black people to chimp out over every perceived anti-black attack (most of which were justified).