What Was the Motive Behind Paul Anthony Ciancia's Actions at LAX?

According to KTLA, in the days leading up to Friday’s LAX shooting, Ciancia sent a series of “angry, rambling” text messages to family members, including one to Ciancia’s younger brother that made Ciancia’s father think his son was suicidal. 
“Their younger child got a text message from Paul stating that there were some comments in there about his well-being and he wanted to possibly take his own life,” Chief Allen Cummings told reporters. Ciancia was apparently disgruntled about the Transportation Security Administration, saying in a note that they had violated his constitutional rights. He apparently referred to himself as a “pissed-off patriot.” 
According to HLNTV, Ciancia had material on him that expressed anti-government and anti-TSA sentiment. He also may have been a believer in The New World Order, generally considered a conspiracy theory in which a group of elites are thought to be forming a one-world government.
I blame Orlin Sellers and all the other arm-chair government haters who spout their poison continually which every once in a while motivates some deranged young man to act.