AM I RACIST TOWARDS ARAB MUSLIMS?

    I was  in  bar ,under the shade outside ,with friends having a good time ,resting,chatting,i am  a christian  and very aware of  world news concerning terrorism  and all aspects of life,while there a Muslim woman i think because she was wearing the normal  black hijab  which is customary in the Muslim religion they all wear,she stepped into the bar and just stood staring ,my initial thinking was that she might be a suicide bomber even if i was wrong ,i did not know what to  think  towards this woman .
      All i did was to alert my friends to look towards the woman and observe her behavior we were  having pizza and just ordered them ,had not even started eating but i brought a decision to quickly move away from  the bar and go very far from this bar.
   Now i have so many  Muslim friends  ,i study with  them ,eat with them but i acted on my instincts and although there was nothing like an explosion  that day ,i just though what i had done was right,i wanted to prevent any bad situation than cure it ,most female suicide bombers dress these way to commit their crimes so the bombs are not noticed.
    For the fact that i immediately went away from he bar seeing her come in  maybe to eat i have done anything wrong to go away seeing her,is this in any way related to me being a racist  ,anything could have happened,and if i died maybe due to an explosion  and did not listen to my instinct then my stupidity killed me.
   No offence to any Muslim person
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          .......eRIXSTER.