It seems there's no such thing as being patriotic enough. This happened last month according to Parents Against Gun Violence.
My fellow patriot and I had different views about how exactly to overthrow the tyrannical government of the United States, so I shot and killed him. (IA, 11/10)
http://www.carrollspaper.com/Content/Local-News-Archive/Local-News/Article/Militiamen-s-political-spat-ends-with-gunshot/1/1/21157