Incidents like this polarise opinion like few others, and do add grist to Naomi's mill and her views on Islam.
My difficulty is this - if you are unable to separate a minority of fanatics from a faith as a whole, then you are in danger of overly simplistic generalisation, which is unhelpful in viewing the world in which we live.
Human nature dictates that a minority of people will always offer extreme views on their world, and back that up with psychopathic behaviour.
I have states several times previously that the easy misinterpretation of a religious sect's chosen text in order to perpetrate atrocities is an easy way to avoid the alternative.
As human beings, we gravitate towards the best view of ourselves as people, and to be honest, "I am fighting a just and holy war for God against unbelievers …." sits far better in the mind that the reality - "I am a psychopath and I like killing and maiming innocent strangers because it makes me feel better …" which is the unpalatable truth.
The worry is, if you bracket all Muslims under the blanket of 'Islam' and use that term like the word 'Cancer' - to stimulate a Pavlovian response of fear and suspicion, then you run the serious risk of placing an inaccurate label on an entire group of people who are innocent of the thoughts and crimes of a few extremists who hang their abhorrent behaviour on the nonsense of following a faith which does not express such views.
Here's a thought - if you bracket an entire race of people together, decide they are evil and that they should not share the planet with you, you are thinking like a terrorist, and who would honestly want to do that?