This is why normal rational people are afraid of Muslims

It isn't Islamophobia. It isn't racism.  It isn't your grammar, your diction, or your upbringing.

It's the fact a Muslim might turn around and attack people at gunpoint or knifepoint and that's allowed by Islam towards normal rational people without provocation that is more than concerning. I pointed it out in this post here.

It's that they can live a normal life, and lie to us all, and unleash evil that is justification to make any rational person concerned.

This is no different than being concerned about people in any other group that advocated violence - like a Montana militia, or a radical Christian sect, or a Mexican cartel or whatever. For any stereotype there is a kernel truth underlining the assumptions towards a group.