Apparently Ahmed hasn't heard about the students getting suspended, expelled, and/or arrested just for having the wrong haircuts, wearing patriotic t-shirts, bringing aspirin to school, or drawing pictures of guns.
But, Ahmed can bring to school a disassembled "clock" that looks exactly like an explosive device, and an invitation to the WH is offered to him.
Clock Boy is a Caucasian male. Someone needs to tell the little genius that Arabs are Caucasian. I wonder which of the three primary races he thinks he belongs to.