I know there's lots of Greek symbols used in higher math, but how do you mistake it for Arabic? And even if he was writing in Arabic, how does "Mediterranean-looking guy writing on a piece of paper" equal "terrorist plotting to blow up the plane"? The racism and ignorance is outstanding.
Now excuse me while I go back to scribbling some differential equations on a piece of paper (My class project actually involves designing a substation building for NJ Transit 
).