I couldn't agree more with MD & MM. If they're going to go around calling this young man a terror suspect, they should be doing the same of everyone arrested under similar circumstances. Why wasn't the guy who opened fire in a cinema a terrorist? I can't think of anything much more terrifying than that.

As for how a young Australian comes to hold an extremist view that is so against the country he/she lives in, I don't know. Maybe they haven't been well accepted by the Australians around them and have reached out for something from 'home'. Maybe it is a family influence. I guess there could be any number of reasons, and if they find extremists who seem to be understanding, who want to listen to them and show them a better way, at a young age it would be very easy to take it all in and believe it.