There's precedent, so we don't have to guess what is going to happen. After the Detroit riots in 1967, the outcomes were studied. Loss of taxpayers, loss of businesses and the associated loss of property and sales tax revenue, areas of the city never rebuilt, permanent demographic changes.
In his autobiography, Coleman Young, the first black mayor of Detroit wrote about the impact of the riots.
"The heaviest casualty, however, was the city. Detroit's losses went a hell of a lot deeper than the immediate toll of lives and buildings. The riot put Detroit on the fast track to economic desolation, mugging the city and making off with incalculable value in jobs, earnings taxes, corporate taxes, retail dollars, sales taxes, mortgages, interest, property taxes, development dollars, investment dollars, tourism dollars, and plain damn money. The money was carried out in the pockets of the businesses and the white people who fled as fast as they could. The white exodus from Detroit had been prodigiously steady prior to the riot, totaling twenty-two thousand in 1966, but afterwards it was frantic. In 1967, with less than half the year remaining after the summer explosion—the outward population migration reached sixty-seven thousand. In 1968 the figure hit eighty-thousand, followed by forty-six thousand in 1969."Portland, Seattle, Chicago and many other cities are going to see an exodus.
The threads break, the fabric weakens.
“Chaos was the law of nature; Order was the dream of man.”