There is no such thing as "gun violence."
This phrase is a clever way to impose the idea of "gun = bad" by forever linking "gun" to a noun ("violence") with negative connotations. It's a brilliant way to weaponize words.
The same name-game parlor trick is used on nearly everything the politically elite present to the rest of us for consumption without question.
If an idea is packaged and presented via an emotionally charged framework (with slight-of-hand vocabulary) the peasants are more likely to echo emotional appeals for support, without hesitation, and will deride all who attempt any analytical analysis intended to support logical discussion.
Words matter in the game of propaganda, but none of this is new. Multiple classics attempted to warn us for years: Animal Farm, 1984, Brave New World, The Once and Future King, Fahrenheit 451, and Harrison Bergeron... to name a few.