I believe, he is a freak....he decleared himself Mesiah....even after he served his full prison time...he still talks insanely time to time (no one pays attention)Did the guy give any reason for the attack? Was it religious or politically motivated or, was he just like you say, just a freak?
There's a lot of people out there that will use a certain belief as an excuse to commit acts like that.
But it is well known that, intelligence agencies choose these kind of mentally broken people for such assassinations. So, we can never know...
I mean, 2 years before shooting the pope. He shot a very famous,valuable Turkish journalist....police got him, he served 2 years in the prison, then he escaped the prison and shoot pope....