Naomi - You have to blame the faith. The faith is the source of this appalling mentality. //
No - the faith is the excuse for this appalling mentality, which is not the same thing at all.
People who like killing people, whether through mental illness, or simply because they are born bad, can always find an excuse on which to hang their hidious mind-set. If Islam did not exist, they could use the Mickey Mouse Club, the 'cause' doesn't matter.
I have said before, but I think it bears repeating, if you enjoy hurting and killing total strangers, or even members of your own family, it's easier to look in the mirror and say "I am doing this in the name of Islam ..." because the alternative is to say "I an irredeemably horrible human being, and the human race will be better when I am dead ..." which is actually the truth.
// A poor mentally disturbed person he was not. //
Poor - no, the mentally ill do not need our pity, but we have to say that anyone who behaves like this is clearly mentally disturbed.
That is not all he was - he was an irredeemably horrible human being and the human race is better off now he's dead - but his actions may have stemmed from a psychotic persoanlity, and he just happened to find a trendy 'faith' cause to hang his psychosis on.