Not all homeless people are black and I'm assuming he's referring to spraying the sidewalk while I'm assuming the homeless are sleeping there.
I mean I don't agree with him and they can request the homeless move as it's being washed in the morning but I would want more info on this
The article touches on that:
But one councilman objected to the proposal, suggesting washing sidewalks with water is a form of microaggression.
Councilmember Larry Gossett objected to the idea of power-washing the sidewalks in the troubled area because it brings back the images of police using hoses against civil-rights activists.