There are only 3 reasons to support anti gun laws
1) because you are stupid, gullible and to lazy to to basic research on the question . Stupidity is the only excusable reason , dumb can't be helped.
2) You want to impose your will on an unwilling population, such as some form of genocide, or enslaveing the population to a tyrannical form of govt. You can't get away with that sort of thing if every Tom, Dick, and Harry has the power to veto your plans. As Mao said, "All political power comes from the barrel of a gun." and if the PEOPLE have them then govt. remains the servant of the people, not the other way around.
3) You are in league with the Robbers, rapists, and murderers, for a politician this would mean they are paying him (or her) off either with cash, services, or loot. Like the way New York politicians are in bed with the Unions ( Mafia).
To sum up, if you support gun control you are either an Idiot, a Traitor, or a Co conspirator.