Great, then they can have a plane load full of terrorists that don't have to hijack it to fly it onto a building, they'll all be willing participants.
To make your idea work, you would have to restrict "Mulsim Air" to muslim countries. Muslims flying muslims to muslim lands ONLY.
I don't have a problem with that.
And make sure all the planes are clearly marked so our F-16s can take them down when they get within 1000 miles of our shore.