Many Trump supporters have lots of problems, and those deplorables are bringing those problems to us. They’re racists. They’re misogynists. They’re islamophobic. They're xenophobes and homophobes. And some, I assume, are good people.
Personally If I was an American I would be concerned by the amount of gun crime in the US but on this occasion I don't think gun control is the issue. I would be more concerned on how the gunmen was able to gain access to the facility and was able to bring a gun. I don't think the gun is the problem here as this attacker had obviously planned this out well and i'm sure if he was unable to get a gun in he would of explored other ways to inflict damage.
‘This is not peace, it is an armistice for 20 years.’ (Ferdinand Foch. After the Treaty of Versailles, 1919).