Canada has issued a travel advisory to some Arabs living in Canada–against travelling to the United States! Canadian officials think the extra scrutiny Arabs are supposedly (are they, now, really?) getting in the U.S. is unfair. Canadian citizens should be exempt–even if they’ve come from other countries in order to gain easy access to the U.S.
That being said, I’m all for any Arab terrorists living in Canada staying away from the U.S., of course. So be advised.