Brother remembers 19-year-old Jacksonville shooting victim | USA TODAY

Brother mourns Jacksonville victim A.J. Laguerre after he was killed in a hate-driven shooting at a Dollar General where he worked.

The Jacksonville shooting comes as Black communities are still reeling from other racial attacks, including last year's killing of 10 Black grocery shoppers in Buffalo, New York, and the murder of nine churchgoers in Charleston, South Carolina, in 2015. Some say they worry media attention and intense rhetoric may have emboldened more extremists. And they worry the racially motivated attacks, which harken back to more violent times in the nation's history, will continue.