Last week, the president heard about plans for the mural, and angrily ranted on Twitter, saying it would be "denigrating this luxury avenue" and "antagonise New York's Finest" (presumably the police?).
He also referred to the slogan as a "symbol of hate" and said he hoped the police wouldn't let it "be affixed to New York's greatest street", which many interpreted as a worrying dogwhistle for people (police or otherwise) to reject instructions and intervene.
Of course, there is nothing "hateful" about a rallying cry to end institutional racism which literally costs lives.
At the time, New York Mayor Bill de Blasio recognised this, tweeting an absolute mic drop in response:
@realDonaldTrump Here’s what you don’t understand:
Black people BUILT 5th Ave and so much of this nation.
Your “lu… https://t.co/NNgnFIR8ae
Black Lives Matter murals have been painted across the country in recent months, including outside the White House. It seems beyond fitting that one should stand front and centre in front of the building Trump holds the most dear.