There is a point of view that the reason the USA has events like mass shootings is the USA has too much freedom. It does stand to reason that if almost anybody can purchase a firearm, the odds are that occasionally someone with their own agenda will get one, or several, and start shooting people. That "too much freedom" business doesn't apply only to firearms. It also applies to speech, religion, assembly, travel, etc. I do not agree with this point of view.
I do have a point of view regarding firearms (I own several). I"m okay with some firearms being banned as long as that ban applies to everyone, public and private. If I can only have single shot shotguns, bolt action rifles, and revolvers, then those weapons are good enough for government employees at all levels - local, county, state, and federal - including the military. The military could have access to the banned weapons when it is deployed to foreign countries. I know, people will say, "But, but, the government won't be able to protect us unless the government is armed to the teeth" to which I say, "Tough shit!" If people think the government actually protects anyone, you are delusional.