I would support increased gun control if it would result in a reduction of gun violence. However, that's been proven ad nauseum to be untrue in the US.
This entire article is BS because it seems to say : restrictions on law-abiding gun owners = less gun violence, which is patently idiotic. Killings by legal firearms owners are less common than being killed by hammers.
Why does gun violence happen? Well if you examine the statistics, you quickly find out that the overwhelming majority of gun crime is perpetrated by non-legal owners in poor neighborhoods with little social, education, and economic opportunity. There is simultaneously a broken criminal justice system which spends ludicrous amounts of money prosecuting drug crimes and warehousing those people, which strains the overall system, meaning that someone with a history of violent crime is often free in a brief period of time. The majority of the time, someone who is convicted of a murder by firearm has a history of violent crime.
A more real-world fix for the US :
End the broken drug war, increase dramatically penalties for violent crime, increase education and rehabilitation opportunities in the most affected neighborhoods.
Your odds of being killed in a mass shooting event are about as likely as being struck by lightning. Your odds of being killed by a single shooter in a particularly rough neighborhood are stratospherically higher. Want to guess if all those citizens and criminals in the rough neighborhood will want to voluntarily hand in their guns if tougher gun legislation is passed? Hah. No chance.