Fiction Adaptation - Character Profiling

So as I said, the story will follow one character. John Doe. Why call him John Doe? Well, there is an ideaology I am using about this. In typical modern mass murder shootings, the shooter is often an unknown person who one day freaks out, let's take columbine, the shooters were outcasts of a school called the 'trench coat mafia'. making this relevant, my guy will be one of these social recluses. Relating this back to the name, John Doe is what the Police use when they find a body that they can't identify. So in effect John Doe is a meaningless person that nobody knows or can identify, until after the event. Profiling the character I want to relate him to Heath Ledgers the Joker.Here is a short clip of one of his performances, as you can see, meticulous, intelligant but completely delusional.

So why is he doing this? Well, he's a Neo-Nazi, he hates the islamification of europe and has read 2083, the manifesto by brievik, i'll post the link below. Hopefully I can get a nazi flag of some kind in the background, he wants to prove a point by ending lots of peoples lives, similar to brievik.

I also want to sort of relate this to wrestling promos. Wrestling promos are essentially words thrown between wrestlers to further tell a story, but the way CM Punk executes his promos are subliminal, intelligent and fantastic and telling a story, here is his famous pipebomb promo, and I want to reflect this in John.