A person does have to wonder if anything involving Bloomberg's money wouldn't have an anti-gun slant.
There has been a big surge in gun deaths due mainly to an increase in gun suicides. "Nearly 40,000 people were killed by guns in the United States in 2017, according to new data released by the Centers for Disease Control and Prevention. The total brings the country’s gun death rate to its highest point in more than two decades.... "The increase in the gun death rate, at least in 2017, was driven by suicides. Sixty percent of gun deaths last year were self-inflicted. While the rate of gun homicides has fluctuated over the last decade, the rate of gun suicides has steadily increased.... "The surge in firearm suicide was not spread evenly among states. Places with higher rates of gun ownership saw the biggest increases in gun suicide rate.... "The overwhelming majority of Americans who ended their lives with guns last years were white (91 percent) and male (87 percent)." https://www.thetrace.org/rounds/gun-death-rate-2017-increase-cdc-suicide/
Since 1999, the gun suicide death rate has incensed by 13%; hanging/suicide rate increased 89%. Unless you want to make gun ownership illegal, you aren't going to do anything about suicides.
Perhaps they were individuals who simply could not handle and accept the fact that Donald Trump was elected president of the united states instead of Hillary Clinton?