Nada Bakos, an ex-CIA analyst, draws attention to the apparent USG and beyond failure to counter non-Jihadist violence, this time citing the LAX incident. She starts with:
Early warning intelligence looks a lot like this DHS report from 2009; Rightwing Extremism: Current Economic and Political Climate Fueling Resurgence in Radicalization. That early warning analysis is directly related to the LAX shooting among others. The problem is, as with other early warning analysis, it wasn’t given the proper public discussion and government action because it was perceived as controversial. It got swept under the rug because no one wanted to acknowledge the dark side of extreme/fringe right politics in the US.

(And ends with) We have the information and forewarning to develop a strategy and not be caught on our heels by rightwing extremist armed gunmen. Just because they look like us, talk like us and reside in the US, doesn’t make them any less of a threat than Islamic extremists.
Link:espionneanalyst.wordpress.com/2013/11/02/early-warning-of-the-lax-shooting/