"Getachew Fekede, 53, a Kenyan refugee and former employee of FreightCar America killed one worker and wounded three others Oct. 25, 2016, at the company’s building in Roanoke, Virginia."
"Charles “Cookie” Thornton, 52, the only black gunman on the list, went on a shooting rampage Feb. 7, 2008, at Kirkwood, Missouri, City Council meeting, where he killed a councilwoman, two police officers and two other people."
Your own list is self contradictory and you want to include every homicide in which more than two people are shot, how about we compare the actual homicide rate between whites and blacks? I guess that would be because blacks account for 52.5% of the homicide rate even though they only account for 13.3% of the population, another interesting statistic comes from the FBI, between 1985 and 2005 Muslims accounted for appx. 97% of all terrorism related deaths.