I must be either incredibly lucky or naive but I'm not scared in the slightest. I spent 8 years in Melbourne regularly visiting and spending hours each week in largely Muslim communities and never for one moment felt nervous. And this was after September 11.
As for categorising that as the worst atrocity, I think there are many wars in Africa and deaths on a large scale where people might disagree. It may be one of the worst in the western world in recent history, but that's as high as I'd put it.
I'm not daft. DH has a sabbatical in 2 years and we were looking at taking the kids to Europe for 2 months but now we'll stay in Australia.
The world has been at war with itself in one form or another for generations. Now we have the Internet and social media it's more in our face.
I genuinely don't believe we have more to fear.