As a matter of fact most muslims throughout the world DO agree with what happened here and your friends are the exception
I know and work with many fine citizens and longtime resident aliens of this country who are of Iranian , Pakistani , Bangladeshi,etc. background.
It's recent immigrants that must be viewed with suspicion.
As to muslims residing outside of the country, make no mistake that they are happy as hell about what happened.
I am delighted to know that you are acquainted with ALL Muslims who reside outside the U.S. and that they have personally advised you of their glee over the incidents of September 11. Yeah, right....