Consider what 'normal' is. Normal is what is considered the norm. The thing that most people do. That's the norm. Many people these days don't seem able to distinguish normal from civilised or humane or decent.
Is it normal to be afraid of the idiots that make up this 'Islamic State' (which has, in my opinion, very little to do with Islam and more with spreading fear and oppression)?
If you say, "yes, it's normal to be scared of them", then you are influenced by the media who focus on those folks. They instil the fear in you. And then you are normal. Following the norm. Following the trend that allows others to control and - even worse - manipulate you.
Step out of that box. Do your own thinking. The chances of being killed by someone from IS are far less than being shot in an American school (now there's something uplifting). Stepping outside the box is scary. For some people it's impossible, because they don't even know there is a box.
I won't be normal. That doesn't mean I'll be a freak (although there's nothing wrong with that once you're outside the box). Remember there's more than black and white. There are more than fifty shades of grey. Being different shouldn't make you an oddball. Alas, the holy norm which decrees what's normal will do just that. Don't fit in? Then you need therapy! Like happened in Russia some decades ago. Like the US school system does these days. Like most of the manipulated, western world does.