No. Let's see what happens if this same story is told without the racism. Bob is on the phone with his mother and said he will have a "salad" tonight. Sally across the aisle heard it as "suicide" and reports him. The attendant promptly calls security, has him evicted, and the FBI is called. Does that sound reasonable to you?

So no. Many people did lots of things wrong that day. The passenger who obviously doesn't know arabic mishears a word and reports him out of prejudice. The staff who took the complaint seriously because of his race. The security and FBI who harassed him for a long time as a result.

Do you really think a white man uttering Allah (where that's the only word heard by another passenger) would be subjected to the same treatment? And also, even if the man WAS a terrorist, do you really think he would go on the phone and talk about his terrorist plots in the open? Even if this guy said "martyr", that still does not warrant the treatment he received. Just like if Bob actually said "suicide," literally it's just a word that's sometimes used in a bad context. He wasn't misheard as saying "I will blow up this plane." So it took many layers of prejudice for this to happen.