Freedom
There are horror stories about the old Soviet Union forcing their freedom-aspiring citizens into mental institutions because they didn't toe the party line. That same tactic can easily migrate into western culture if allowed. A case in point:
“The thing that is interesting here is that they were saying that because I don’t think like them, I am sick and mentally ill”
This is why all freedom-loving American's are scrutinizing the manner in which citizens are denied their civil right to bear arms. Similar tactics can creep into things like using non-vetted lists, such as the "no-fly list" as a basis for including citizens in NICS.
Not to happen in a free country!
/fl