I don't think the author is referring literally to people with mental illnesses. They're referring to the IRA. https://en.m.wikipedia.org/wiki/List_of_terrori

I don't think the author is referring literally to people with mental illnesses. They're referring to the IRA. https://en.m.wikipedia.org/wiki/List_of_terrorist_incidents_in_Great_Britain https://en.m.wikipedia.org/wiki/List_of_terrorist_incidents_...