Manner is more about social class than race. Low class people do that all the time, in every place, every country, every color. Class and manner stay where they are, hard to change, and color or white do not make it worse or better.
It does take quite some time to grasp the proper breath technique.
Meanwhile, it's always recommended to ring your bell when approaching joggers from behind. They may swerve right on your way if they don't sense your existence.