No initially I do not think you have to panic, most Muslims are like most Christians, like most Jews, like most Sikhs etc. They are all people and by and large you will probably like almost every one of them you have a chance to interact with. 

What you have to be careful of are the extremes... the ones like the Klan with Christians, or the radical Jews or the violent Sikhs. That is why you have to be careful of the long Niqabs where a man can dress up and have bombs or guns underneath the garb, and I mention the danger with escalators etc.