The term "gun nuts" has different connotations that the usual use of the word "nut" to describe someone with a mental illness.

I also still think that if libraries had more materials quickly accessible about mental health resources through their web-sites, there would be less ignorance about people with mental illnesses.

As in the movie and books The Girl with the Dragon Tattoo and its sequels, a label of mental illness can you be used as a weapon to silence people who are whistleblowers, critics, troublemakers, and/or victims of someone with powers over them. Part of the ability to use mental illness as a weapon is that so many people still do not understand various mental illnesses.