Alleged movie theater shooter calls himself The Joker. Why?

Rating: 8/10 (29 July 2012)

"I'm the Joker," alleged cinema theater shooter James Holmes purportedly said to cops who arrested him. Did Holmes fancy himself to be a deranged, nihilistic loony with a penchant for make-up and a slurry accent? Was he captivated by the Joker's desire to bring all those who were good in society down to his level?
The Joker creating the stand-off between the two ferries is something I've never seen in movies, and I must credit director Nolan for milking every ounce of tension in the countdown leading to the midnight blast.
The Joker has little value for life. The opening scene, in which robbers knock off a preceding robber in cold blood, will send shivers down the spines of robbers everywhere, not to mention viewers everywhere, too.
Health Ledger certainly deserved a posthumous Oscar award for his portrayal of the Joker. Viewers will detect a carefree recklessness in his character, someone who is intent on making sure that hope will never spring eternal. In fact, district attorney Dent would have pulled the trigger at the end the flick if it weren't for the intervention of Batman.
Batman in 2008 represented a United States in the throes of confusion. The US could feel the lava of enmity flowing towards it from all corners of the world for its destructive invasions of Afghanistan and Iraq. In fact, Batman accepts that his vigilante actions wouldn't get the approval of everyone in Gotham.
I read this to mean that the US knew that its imperialistic tendencies had not gone down well with the rest of the world, but it was so vain to believe that it was doing the right thing that it was willing to accept the world's hatred towards it. It was cool with being the fall guy.